31113221011120 has 80 divisors (see below), whose sum is σ = 72537545424960. Its totient is φ = 12411045478400.

The previous prime is 31113221011043. The next prime is 31113221011127. The reversal of 31113221011120 is 2111012231113.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (31113221011127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42662340 + ... + 43385500.

It is an arithmetic number, because the mean of its divisors is an integer number (906719317812).

Almost surely, 2^{31113221011120} is an apocalyptic number.

It is an amenable number.

31113221011120 is an abundant number, since it is smaller than the sum of its proper divisors (41424324413840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31113221011120 is a wasteful number, since it uses less digits than its factorization.

31113221011120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724654 (or 724648 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 31113221011120 its reverse (2111012231113), we get a palindrome (33224233242233).

The spelling of 31113221011120 in words is "thirty-one trillion, one hundred thirteen billion, two hundred twenty-one million, eleven thousand, one hundred twenty".