100000131021 has 12 divisors (see below), whose sum is σ = 165079581472. Its totient is φ = 57142931976.

The previous prime is 100000131013. The next prime is 100000131047. The reversal of 100000131021 is 120131000001.

It is not a de Polignac number, because 100000131021 - 2³ = 100000131013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100000130994 and 100000131012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100000131001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 793651771 + ... + 793651896.

Almost surely, 2^100000131021 is an apocalyptic number.

It is an amenable number.

100000131021 is a deficient number, since it is larger than the sum of its proper divisors (65079450451).

100000131021 is a wasteful number, since it uses less digits than its factorization.

100000131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587303680 (or 1587303677 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 100000131021 its reverse (120131000001), we get a palindrome (220131131022).

The spelling of 100000131021 in words is "one hundred billion, one hundred thirty-one thousand, twenty-one".