31321012012 has 12 divisors (see below), whose sum is σ = 54813079440. Its totient is φ = 15660132176.

The previous prime is 31321012001. The next prime is 31321012027. The reversal of 31321012012 is 21021012313.

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, 191793 + ... + 315319.

It is an arithmetic number, because the mean of its divisors is an integer number (4567756620).

Almost surely, 2^31321012012 is an apocalyptic number.

It is an amenable number.

31321012012 is a deficient number, since it is larger than the sum of its proper divisors (23492067428).

31321012012 is a wasteful number, since it uses less digits than its factorization.

31321012012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186920 (or 186918 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31321012012 its reverse (21021012313), we get a palindrome (52342024325).

The spelling of 31321012012 in words is "thirty-one billion, three hundred twenty-one million, twelve thousand, twelve".