31031122012 has 24 divisors (see below), whose sum is σ = 62359194240. Its totient is φ = 13362683760.

The previous prime is 31031121971. The next prime is 31031122013. The reversal of 31031122012 is 21022113013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031122013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18558448 + ... + 18560119.

It is an arithmetic number, because the mean of its divisors is an integer number (2598299760).

Almost surely, 2^31031122012 is an apocalyptic number.

It is an amenable number.

31031122012 is an abundant number, since it is smaller than the sum of its proper divisors (31328072228).

31031122012 is a wasteful number, since it uses less digits than its factorization.

31031122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37118601 (or 37118599 counting only the distinct ones).

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

Adding to 31031122012 its reverse (21022113013), we get a palindrome (52053235025).

The spelling of 31031122012 in words is "thirty-one billion, thirty-one million, one hundred twenty-two thousand, twelve".