313133121 has 20 divisors (see below), whose sum is σ = 534591552. Its totient is φ = 178932888.

The previous prime is 313133111. The next prime is 313133123. The reversal of 313133121 is 121331313.

It is a happy number.

313133121 is a `hidden beast` number, since 313 + 1 + 331 + 21 = 666.

It is not a de Polignac number, because 313133121 - 2⁹ = 313132609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 313133094 and 313133103.

It is not an unprimeable number, because it can be changed into a prime (313133123) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 275565 + ... + 276698.

Almost surely, 2^313133121 is an apocalyptic number.

It is an amenable number.

313133121 is a deficient number, since it is larger than the sum of its proper divisors (221458431).

313133121 is an equidigital number, since it uses as much as digits as its factorization.

313133121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552282 (or 552273 counting only the distinct ones).

The product of its digits is 162, while the sum is 18.

The square root of 313133121 is about 17695.5678349128. The cubic root of 313133121 is about 679.0623762848.

Adding to 313133121 its reverse (121331313), we get a palindrome (434464434).

The spelling of 313133121 in words is "three hundred thirteen million, one hundred thirty-three thousand, one hundred twenty-one".