31113221120023 has 48 divisors (see below), whose sum is σ = 37428179652864. Its totient is φ = 25772654718720.

The previous prime is 31113221119963. The next prime is 31113221120063. The reversal of 31113221120023 is 32002112231113.

It is a de Polignac number, because none of the positive numbers 2^k-31113221120023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31113221119976 and 31113221120003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113221120063) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92850486 + ... + 93184972.

It is an arithmetic number, because the mean of its divisors is an integer number (779753742768).

Almost surely, 2^{31113221120023} is an apocalyptic number.

31113221120023 is a deficient number, since it is larger than the sum of its proper divisors (6314958532841).

31113221120023 is a wasteful number, since it uses less digits than its factorization.

31113221120023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335012 (or 335005 counting only the distinct ones).

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

Adding to 31113221120023 its reverse (32002112231113), we get a palindrome (63115333351136).

The spelling of 31113221120023 in words is "thirty-one trillion, one hundred thirteen billion, two hundred twenty-one million, one hundred twenty thousand, twenty-three".