31311122012000 has 96 divisors (see below), whose sum is σ = 76933176020064. Its totient is φ = 12524164032000.

The previous prime is 31311122011921. The next prime is 31311122012029. The reversal of 31311122012000 is 21022111313.

It is a self number, because there is not a number n which added to its sum of digits gives 31311122012000.

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, 317594714 + ... + 317693286.

It is an arithmetic number, because the mean of its divisors is an integer number (801387250209).

Almost surely, 2^{31311122012000} is an apocalyptic number.

It is an amenable number.

31311122012000 is an abundant number, since it is smaller than the sum of its proper divisors (45622054008064).

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

31311122012000 is an equidigital number, since it uses as much as digits as its factorization.

31311122012000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178009 (or 177991 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31311122012000 its reverse (21022111313), we get a palindrome (31332144123313).

The spelling of 31311122012000 in words is "thirty-one trillion, three hundred eleven billion, one hundred twenty-two million, twelve thousand".