31311212104 has 64 divisors (see below), whose sum is σ = 61810813440. Its totient is φ = 14841066240.

The previous prime is 31311212063. The next prime is 31311212113. The reversal of 31311212104 is 40121211313.

It is a super-2 number, since 2×31311212104² (a number of 22 digits) contains 22 as substring.

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, 13373974 + ... + 13376314.

It is an arithmetic number, because the mean of its divisors is an integer number (965793960).

Almost surely, 2^31311212104 is an apocalyptic number.

It is an amenable number.

31311212104 is a deficient number, since it is larger than the sum of its proper divisors (30499601336).

31311212104 is a wasteful number, since it uses less digits than its factorization.

31311212104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2990 (or 2986 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31311212104 its reverse (40121211313), we get a palindrome (71432423417).

The spelling of 31311212104 in words is "thirty-one billion, three hundred eleven million, two hundred twelve thousand, one hundred four".