31312013112012 has 24 divisors (see below), whose sum is σ = 77359091218416. Its totient is φ = 9823376662528.

The previous prime is 31312013111999. The next prime is 31312013112047. The reversal of 31312013112012 is 21021131021313.

It is a super-2 number, since 2×31312013112012² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31312013112012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76745129973 + ... + 76745130380.

It is an arithmetic number, because the mean of its divisors is an integer number (3223295467434).

Almost surely, 2^{31312013112012} is an apocalyptic number.

It is an amenable number.

31312013112012 is an abundant number, since it is smaller than the sum of its proper divisors (46047078106404).

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

31312013112012 is a wasteful number, since it uses less digits than its factorization.

31312013112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153490260377 (or 153490260375 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 31312013112012 its reverse (21021131021313), we get a palindrome (52333144133325).

The spelling of 31312013112012 in words is "thirty-one trillion, three hundred twelve billion, thirteen million, one hundred twelve thousand, twelve".