100021000131 has 24 divisors (see below), whose sum is σ = 164740474080. Its totient is φ = 57930713856.

The previous prime is 100021000129. The next prime is 100021000139. The reversal of 100021000131 is 131000120001.

It is not a de Polignac number, because 100021000131 - 2¹ = 100021000129 is a prime.

It is a super-2 number, since 2×100021000131² (a number of 23 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (100021000139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25141551 + ... + 25145528.

It is an arithmetic number, because the mean of its divisors is an integer number (6864186420).

Almost surely, 2^100021000131 is an apocalyptic number.

100021000131 is a deficient number, since it is larger than the sum of its proper divisors (64719473949).

100021000131 is a wasteful number, since it uses less digits than its factorization.

100021000131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50287115 (or 50287112 counting only the distinct ones).

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

Adding to 100021000131 its reverse (131000120001), we get a palindrome (231021120132).

The spelling of 100021000131 in words is "one hundred billion, twenty-one million, one hundred thirty-one", and thus it is an aban number.