31012012012 has 24 divisors (see below), whose sum is σ = 54568515456. Its totient is φ = 15421166208.

The previous prime is 31012011991. The next prime is 31012012043. The reversal of 31012012012 is 21021021013.

It is a junction number, because it is equal to n+sod(n) for n = 31012011983 and 31012012001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 785038 + ... + 823594.

It is an arithmetic number, because the mean of its divisors is an integer number (2273688144).

Almost surely, 2^31012012012 is an apocalyptic number.

It is an amenable number.

31012012012 is a deficient number, since it is larger than the sum of its proper divisors (23556503444).

31012012012 is a wasteful number, since it uses less digits than its factorization.

31012012012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39657 (or 39655 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31012012012 its reverse (21021021013), we get a palindrome (52033033025).

Subtracting from 31012012012 its reverse (21021021013), we obtain a palindrome (9990990999).

The spelling of 31012012012 in words is "thirty-one billion, twelve million, twelve thousand, twelve".