31231220110312 has 16 divisors (see below), whose sum is σ = 58589341805700. Its totient is φ = 15607395628800.

The previous prime is 31231220110289. The next prime is 31231220110331. The reversal of 31231220110312 is 21301102213213.

It can be written as a sum of positive squares in 2 ways, for example, as 28486280260516 + 2744939849796 = 5337254^2 + 1656786^2 .

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, 1026787137 + ... + 1026817552.

Almost surely, 2^{31231220110312} is an apocalyptic number.

It is an amenable number.

31231220110312 is a deficient number, since it is larger than the sum of its proper divisors (27358121695388).

31231220110312 is a wasteful number, since it uses less digits than its factorization.

31231220110312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053606596 (or 2053606592 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31231220110312 its reverse (21301102213213), we get a palindrome (52532322323525).

The spelling of 31231220110312 in words is "thirty-one trillion, two hundred thirty-one billion, two hundred twenty million, one hundred ten thousand, three hundred twelve".