100031232131 has 4 divisors (see below), whose sum is σ = 100299412752. Its totient is φ = 99763051512.

The previous prime is 100031232107. The next prime is 100031232137. The reversal of 100031232131 is 131232130001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131232130001 = 7 ⋅18747447143.

It is a cyclic number.

It is not a de Polignac number, because 100031232131 - 2²² = 100027037827 is a prime.

It is a super-2 number, since 2×100031232131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100031232137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134089751 + ... + 134090496.

It is an arithmetic number, because the mean of its divisors is an integer number (25074853188).

Almost surely, 2^100031232131 is an apocalyptic number.

100031232131 is a deficient number, since it is larger than the sum of its proper divisors (268180621).

100031232131 is an equidigital number, since it uses as much as digits as its factorization.

100031232131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268180620.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 100031232131 its reverse (131232130001), we get a palindrome (231263362132).

The spelling of 100031232131 in words is "one hundred billion, thirty-one million, two hundred thirty-two thousand, one hundred thirty-one".