202221022201021 has 4 divisors (see below), whose sum is σ = 203088923584092. Its totient is φ = 201353120817952.

The previous prime is 202221022200971. The next prime is 202221022201031. The reversal of 202221022201021 is 120102220122202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31212177809796 + 171008844391225 = 5586786^2 + 13077035^2 .

It is a cyclic number.

It is not a de Polignac number, because 202221022201021 - 2³⁹ = 201671266387133 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 202221022201021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221022201031) 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, 433950691186 + ... + 433950691651.

It is an arithmetic number, because the mean of its divisors is an integer number (50772230896023).

Almost surely, 2^{202221022201021} is an apocalyptic number.

It is an amenable number.

202221022201021 is a deficient number, since it is larger than the sum of its proper divisors (867901383071).

202221022201021 is an equidigital number, since it uses as much as digits as its factorization.

202221022201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867901383070.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 202221022201021 its reverse (120102220122202), we get a palindrome (322323242323223).

The spelling of 202221022201021 in words is "two hundred two trillion, two hundred twenty-one billion, twenty-two million, two hundred one thousand, twenty-one".