2100023013021 has 16 divisors (see below), whose sum is σ = 2817990039744. Its totient is φ = 1391040428544.

The previous prime is 2100023013017. The next prime is 2100023013043. The reversal of 2100023013021 is 1203103200012.

It is not a de Polignac number, because 2100023013021 - 2² = 2100023013017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100023013061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1175055 + ... + 2362371.

It is an arithmetic number, because the mean of its divisors is an integer number (176124377484).

Almost surely, 2^{2100023013021} is an apocalyptic number.

It is an amenable number.

2100023013021 is a deficient number, since it is larger than the sum of its proper divisors (717967026723).

2100023013021 is a wasteful number, since it uses less digits than its factorization.

2100023013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191100.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 2100023013021 its reverse (1203103200012), we get a palindrome (3303126213033).

The spelling of 2100023013021 in words is "two trillion, one hundred billion, twenty-three million, thirteen thousand, twenty-one".