31311324120 has 64 divisors (see below), whose sum is σ = 94420746720. Its totient is φ = 8306417664.

The previous prime is 31311324097. The next prime is 31311324139. The reversal of 31311324120 is 2142311313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 652819 + ... + 699138.

Almost surely, 2^31311324120 is an apocalyptic number.

31311324120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31311324120 is an abundant number, since it is smaller than the sum of its proper divisors (63109422600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31311324120 is a wasteful number, since it uses less digits than its factorization.

31311324120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352164 (or 1352160 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31311324120 its reverse (2142311313), we get a palindrome (33453635433).

The spelling of 31311324120 in words is "thirty-one billion, three hundred eleven million, three hundred twenty-four thousand, one hundred twenty".