31200123132 has 96 divisors (see below), whose sum is σ = 81578327040. Its totient is φ = 10311710400.

The previous prime is 31200123043. The next prime is 31200123167. The reversal of 31200123132 is 23132100213.

It is a super-2 number, since 2×31200123132² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10549798 + ... + 10552754.

It is an arithmetic number, because the mean of its divisors is an integer number (849774240).

Almost surely, 2^31200123132 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 31200123132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40789163520).

31200123132 is an abundant number, since it is smaller than the sum of its proper divisors (50378203908).

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

31200123132 is a wasteful number, since it uses less digits than its factorization.

31200123132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3768 (or 3760 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31200123132 its reverse (23132100213), we get a palindrome (54332223345).

The spelling of 31200123132 in words is "thirty-one billion, two hundred million, one hundred twenty-three thousand, one hundred thirty-two".