31121310132 has 96 divisors (see below), whose sum is σ = 89463024000. Its totient is φ = 9276076800.

The previous prime is 31121310109. The next prime is 31121310133. The reversal of 31121310132 is 23101312113.

31121310132 is a `hidden beast` number, since 311 + 213 + 10 + 132 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121310133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142257 + ... + 287192.

It is an arithmetic number, because the mean of its divisors is an integer number (931906500).

Almost surely, 2^31121310132 is an apocalyptic number.

It is an amenable number.

31121310132 is an abundant number, since it is smaller than the sum of its proper divisors (58341713868).

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

31121310132 is a wasteful number, since it uses less digits than its factorization.

31121310132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429534 (or 429526 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31121310132 its reverse (23101312113), we get a palindrome (54222622245).

The spelling of 31121310132 in words is "thirty-one billion, one hundred twenty-one million, three hundred ten thousand, one hundred thirty-two".