31343212012 has 18 divisors (see below), whose sum is σ = 63805824852. Its totient is φ = 13432805064.

The previous prime is 31343211983. The next prime is 31343212031. The reversal of 31343212012 is 21021234313.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79956978 + ... + 79957369.

Almost surely, 2^31343212012 is an apocalyptic number.

It is an amenable number.

31343212012 is an abundant number, since it is smaller than the sum of its proper divisors (32462612840).

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

31343212012 is a wasteful number, since it uses less digits than its factorization.

31343212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159914365 (or 159914356 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31343212012 its reverse (21021234313), we get a palindrome (52364446325).

The spelling of 31343212012 in words is "thirty-one billion, three hundred forty-three million, two hundred twelve thousand, twelve".