31310221312312 has 16 divisors (see below), whose sum is σ = 58706803314360. Its totient is φ = 15655073761824.

The previous prime is 31310221312303. The next prime is 31310221312313. The reversal of 31310221312312 is 21321312201313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31310221312313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821838 + ... + 7955869.

Almost surely, 2^{31310221312312} is an apocalyptic number.

It is an amenable number.

31310221312312 is a deficient number, since it is larger than the sum of its proper divisors (27396582002048).

31310221312312 is a wasteful number, since it uses less digits than its factorization.

31310221312312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9223590 (or 9223586 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 31310221312312 its reverse (21321312201313), we get a palindrome (52631533513625).

The spelling of 31310221312312 in words is "thirty-one trillion, three hundred ten billion, two hundred twenty-one million, three hundred twelve thousand, three hundred twelve".