100021031001 has 48 divisors (see below), whose sum is σ = 156012480000. Its totient is φ = 61604040960.

The previous prime is 100021030973. The next prime is 100021031039. The reversal of 100021031001 is 100130120001.

It is not a de Polignac number, because 100021031001 - 2¹⁴ = 100021014617 is a prime.

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 (100021031081) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 650650 + ... + 789548.

It is an arithmetic number, because the mean of its divisors is an integer number (3250260000).

Almost surely, 2^100021031001 is an apocalyptic number.

It is an amenable number.

100021031001 is a deficient number, since it is larger than the sum of its proper divisors (55991448999).

100021031001 is a wasteful number, since it uses less digits than its factorization.

100021031001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139054 (or 139051 counting only the distinct ones).

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

Adding to 100021031001 its reverse (100130120001), we get a palindrome (200151151002).

The spelling of 100021031001 in words is "one hundred billion, twenty-one million, thirty-one thousand, one".