100001111021 has 32 divisors (see below), whose sum is σ = 120241520640. Its totient is φ = 81370396800.

The previous prime is 100001110969. The next prime is 100001111027. The reversal of 100001111021 is 120111100001.

It is a happy number.

It is not a de Polignac number, because 100001111021 - 2¹⁰ = 100001109997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001111027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2432366 + ... + 2473136.

It is an arithmetic number, because the mean of its divisors is an integer number (3757547520).

Almost surely, 2^100001111021 is an apocalyptic number.

It is an amenable number.

100001111021 is a deficient number, since it is larger than the sum of its proper divisors (20240409619).

100001111021 is a wasteful number, since it uses less digits than its factorization.

100001111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41025.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 100001111021 its reverse (120111100001), we get a palindrome (220112211022).

The spelling of 100001111021 in words is "one hundred billion, one million, one hundred eleven thousand, twenty-one".