31013312120 has 32 divisors (see below), whose sum is σ = 79748517600. Its totient is φ = 10633135488.

The previous prime is 31013312111. The next prime is 31013312159. The reversal of 31013312120 is 2121331013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55380635 + ... + 55381194.

It is an arithmetic number, because the mean of its divisors is an integer number (2492141175).

Almost surely, 2^31013312120 is an apocalyptic number.

It is an amenable number.

31013312120 is an abundant number, since it is smaller than the sum of its proper divisors (48735205480).

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

31013312120 is a wasteful number, since it uses less digits than its factorization.

31013312120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110761847 (or 110761843 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31013312120 its reverse (2121331013), we get a palindrome (33134643133).

The spelling of 31013312120 in words is "thirty-one billion, thirteen million, three hundred twelve thousand, one hundred twenty".