202321013130021 has 4 divisors (see below), whose sum is σ = 269761350840032. Its totient is φ = 134880675420012.

The previous prime is 202321013129969. The next prime is 202321013130029. The reversal of 202321013130021 is 120031310123202.

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 202321013130021 - 2²¹ = 202321011032869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202321013130021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202321013130029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33720168855001 + ... + 33720168855006.

It is an arithmetic number, because the mean of its divisors is an integer number (67440337710008).

Almost surely, 2^{202321013130021} is an apocalyptic number.

It is an amenable number.

202321013130021 is a deficient number, since it is larger than the sum of its proper divisors (67440337710011).

202321013130021 is an equidigital number, since it uses as much as digits as its factorization.

202321013130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67440337710010.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 202321013130021 its reverse (120031310123202), we get a palindrome (322352323253223).

The spelling of 202321013130021 in words is "two hundred two trillion, three hundred twenty-one billion, thirteen million, one hundred thirty thousand, twenty-one".