31322312012 has 12 divisors (see below), whose sum is σ = 54816150480. Its totient is φ = 15660554736.

The previous prime is 31322311883. The next prime is 31322312027. The reversal of 31322312012 is 21021322313.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20687 + ... + 251142.

It is an arithmetic number, because the mean of its divisors is an integer number (4568012540).

Almost surely, 2^31322312012 is an apocalyptic number.

It is an amenable number.

31322312012 is a deficient number, since it is larger than the sum of its proper divisors (23493838468).

31322312012 is a wasteful number, since it uses less digits than its factorization.

31322312012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300640 (or 300638 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31322312012 its reverse (21021322313), we get a palindrome (52343634325).

The spelling of 31322312012 in words is "thirty-one billion, three hundred twenty-two million, three hundred twelve thousand, twelve".