31331023305112 has 16 divisors (see below), whose sum is σ = 58746322248840. Its totient is φ = 15665337372096.

The previous prime is 31331023305097. The next prime is 31331023305139. The reversal of 31331023305112 is 21150332013313.

It is a happy number.

It is a congruent number.

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, 21019438 + ... + 22460605.

Almost surely, 2^{31331023305112} is an apocalyptic number.

It is an amenable number.

31331023305112 is a deficient number, since it is larger than the sum of its proper divisors (27415298943728).

31331023305112 is a wasteful number, since it uses less digits than its factorization.

31331023305112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43570122 (or 43570118 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 28.

Adding to 31331023305112 its reverse (21150332013313), we get a palindrome (52481355318425).

The spelling of 31331023305112 in words is "thirty-one trillion, three hundred thirty-one billion, twenty-three million, three hundred five thousand, one hundred twelve".