31031012012 has 48 divisors (see below), whose sum is σ = 72912037632. Its totient is φ = 11160002880.

The previous prime is 31031012009. The next prime is 31031012039. The reversal of 31031012012 is 21021013013.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 3870998 + ... + 3879005.

It is an arithmetic number, because the mean of its divisors is an integer number (1519000784).

Almost surely, 2^31031012012 is an apocalyptic number.

It is an amenable number.

31031012012 is an abundant number, since it is smaller than the sum of its proper divisors (41881025620).

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

31031012012 is a wasteful number, since it uses less digits than its factorization.

31031012012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7750038 (or 7750036 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31031012012 its reverse (21021013013), we get a palindrome (52052025025).

The spelling of 31031012012 in words is "thirty-one billion, thirty-one million, twelve thousand, twelve".