31023312211331 has 12 divisors (see below), whose sum is σ = 34101199654200. Its totient is φ = 28202022488640.

The previous prime is 31023312211319. The next prime is 31023312211357. The reversal of 31023312211331 is 13311221332013.

It is not a de Polignac number, because 31023312211331 - 2²⁶ = 31023245102467 is a prime.

It is a super-2 number, since 2×31023312211331² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31023312211331.

It is not an unprimeable number, because it can be changed into a prime (31023312211361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1016486 + ... + 7942283.

It is an arithmetic number, because the mean of its divisors is an integer number (2841766637850).

Almost surely, 2^{31023312211331} is an apocalyptic number.

31023312211331 is a deficient number, since it is larger than the sum of its proper divisors (3077887442869).

31023312211331 is a wasteful number, since it uses less digits than its factorization.

31023312211331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8987410 (or 8987399 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 31023312211331 its reverse (13311221332013), we get a palindrome (44334533543344).

The spelling of 31023312211331 in words is "thirty-one trillion, twenty-three billion, three hundred twelve million, two hundred eleven thousand, three hundred thirty-one".