The number 13211
13211 is a composite number with 4 divisors. Its prime factorisation is 11 × 1201. Divisors (4): 1, 11, 1201, 13211.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 13211: a semiprime: 11 × 1201, the product of two primes.
- 2
13211 is composite. Its prime factorisation is
- 3
The divisors add up to 14424; without 13211 itself that is 1213, so 13211 is deficient (1213 is less than 13211). Euler's totient φ(13211) = 12000 numbers up to 13211 share no factor with it.
- 4
The digits of 13211 add up to 8, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 76 steps to reach 1.
LaTeX source of the formulas on this page
\[ 13211 = 11 \times 1201 \]
13211 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 14424 |
| Euler totient φ(n) | 12000 |
| Square | 174530521 |
| Cube | 2305722712931 |
| Square root | 114.939114 |
| Digit sum / digital root | 8 / 8 |
| Collatz steps to 1 | 76 |
| Scientific notation | 1.3211 × |
13211 in other forms
| Form | Value |
|---|---|
| In words | thirteen thousand two hundred and eleven |
| Binary (base 2) | 11001110011011 |
| Octal (base 8) | 31633 |
| Hexadecimal (base 16) | 339B |
| Base 3 | 200010022 |
| As time | 13211 seconds = 3 h 40 min 11 s |
Is 13211 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 1) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 2) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | Yes (13211 ÷ 11 = 1201) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 13211 a prime number?
No. 13211 = 11 × 1201, so it is divisible by 11.
What are the factors of 13211?
1, 11, 1201, 13211.
What is 13211 in binary?
11001110011011 (hexadecimal 339B, octal 31633).
What is the square root of 13211?
About 114.9391.
Is 13211 divisible by 3?
No. Its digits add up to 8, which is not a multiple of 3.
What is special about the number 13211?
13211 is a semiprime: 11 × 1201, the product of two primes.