101000202100021 has 4 divisors (see below), whose sum is σ = 115428802400032. Its totient is φ = 86571601800012.

The previous prime is 101000202100019. The next prime is 101000202100033. The reversal of 101000202100021 is 120001202000101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 101000202100021 - 2¹ = 101000202100019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101000202099980 and 101000202100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101000202100081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7214300149995 + ... + 7214300150008.

It is an arithmetic number, because the mean of its divisors is an integer number (28857200600008).

Almost surely, 2^{101000202100021} is an apocalyptic number.

It is an amenable number.

101000202100021 is a deficient number, since it is larger than the sum of its proper divisors (14428600300011).

101000202100021 is an equidigital number, since it uses as much as digits as its factorization.

101000202100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14428600300010.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 101000202100021 its reverse (120001202000101), we get a palindrome (221001404100122).

The spelling of 101000202100021 in words is "one hundred one trillion, two hundred two million, one hundred thousand, twenty-one".