31011113210021 has 24 divisors (see below), whose sum is σ = 37995545412000. Its totient is φ = 25166867279904.

The previous prime is 31011113209981. The next prime is 31011113210071. The reversal of 31011113210021 is 12001231111013.

It is not a de Polignac number, because 31011113210021 - 2²² = 31011109015717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31011113210071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8425031 + ... + 11532708.

It is an arithmetic number, because the mean of its divisors is an integer number (1583147725500).

Almost surely, 2^{31011113210021} is an apocalyptic number.

It is an amenable number.

31011113210021 is a deficient number, since it is larger than the sum of its proper divisors (6984432201979).

31011113210021 is a wasteful number, since it uses less digits than its factorization.

31011113210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19959441 (or 19959434 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 31011113210021 its reverse (12001231111013), we get a palindrome (43012344321034).

The spelling of 31011113210021 in words is "thirty-one trillion, eleven billion, one hundred thirteen million, two hundred ten thousand, twenty-one".