31102113132 has 96 divisors (see below), whose sum is σ = 83404339200. Its totient is φ = 10012680000.

The previous prime is 31102113131. The next prime is 31102113149. The reversal of 31102113132 is 23131120113.

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

It is not an unprimeable number, because it can be changed into a prime (31102113131) 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, 1695007 + ... + 1713257.

It is an arithmetic number, because the mean of its divisors is an integer number (868795200).

Almost surely, 2^31102113132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31102113132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41702169600).

31102113132 is an abundant number, since it is smaller than the sum of its proper divisors (52302226068).

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

31102113132 is a wasteful number, since it uses less digits than its factorization.

31102113132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18804 (or 18796 counting only the distinct ones).

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

Adding to 31102113132 its reverse (23131120113), we get a palindrome (54233233245).

The spelling of 31102113132 in words is "thirty-one billion, one hundred two million, one hundred thirteen thousand, one hundred thirty-two".