101001202100021 has 4 divisors (see below), whose sum is σ = 101212060560000. Its totient is φ = 100790343640044.

The previous prime is 101001202100011. The next prime is 101001202100039. The reversal of 101001202100021 is 120001202100101.

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 a cyclic number.

It is not a de Polignac number, because 101001202100021 - 2¹⁰ = 101001202098997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101001202099975 and 101001202100011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101001202100011) 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, 105429229271 + ... + 105429230228.

It is an arithmetic number, because the mean of its divisors is an integer number (25303015140000).

Almost surely, 2^{101001202100021} is an apocalyptic number.

It is an amenable number.

101001202100021 is a deficient number, since it is larger than the sum of its proper divisors (210858459979).

101001202100021 is an equidigital number, since it uses as much as digits as its factorization.

101001202100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210858459978.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101001202100021 its reverse (120001202100101), we get a palindrome (221002404200122).

The spelling of 101001202100021 in words is "one hundred one trillion, one billion, two hundred two million, one hundred thousand, twenty-one".