131201321100 has 72 divisors (see below), whose sum is σ = 380222955840. Its totient is φ = 34930447680.

The previous prime is 131201321033. The next prime is 131201321159. The reversal of 131201321100 is 1123102131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 131201321100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167562 + ... + 538961.

Almost surely, 2^131201321100 is an apocalyptic number.

131201321100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131201321100 is an abundant number, since it is smaller than the sum of its proper divisors (249021634740).

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

131201321100 is a wasteful number, since it uses less digits than its factorization.

131201321100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707159 (or 707152 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 131201321100 its reverse (1123102131), we get a palindrome (132324423231).

The spelling of 131201321100 in words is "one hundred thirty-one billion, two hundred one million, three hundred twenty-one thousand, one hundred".