31312200012 has 96 divisors (see below), whose sum is σ = 75864391680. Its totient is φ = 10043792640.

The previous prime is 31312200001. The next prime is 31312200037. The reversal of 31312200012 is 21000221313.

It is a junction number, because it is equal to n+sod(n) for n = 31312199964 and 31312200000.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23738689 + ... + 23740007.

It is an arithmetic number, because the mean of its divisors is an integer number (790254080).

Almost surely, 2^31312200012 is an apocalyptic number.

It is an amenable number.

31312200012 is an abundant number, since it is smaller than the sum of its proper divisors (44552191668).

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

31312200012 is a wasteful number, since it uses less digits than its factorization.

31312200012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911 (or 1909 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31312200012 its reverse (21000221313), we get a palindrome (52312421325).

The spelling of 31312200012 in words is "thirty-one billion, three hundred twelve million, two hundred thousand, twelve".