202220202112021 has 4 divisors (see below), whose sum is σ = 202793063874732. Its totient is φ = 201647340349312.

The previous prime is 202220202112001. The next prime is 202220202112051. The reversal of 202220202112021 is 120211202022202.

202220202112021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 158587703971921 + 43632498140100 = 12593161^2 + 6605490^2 .

It is a cyclic number.

It is not a de Polignac number, because 202220202112021 - 2⁵ = 202220202111989 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 202220202112021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202220202112001) 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, 286430880826 + ... + 286430881531.

It is an arithmetic number, because the mean of its divisors is an integer number (50698265968683).

Almost surely, 2^{202220202112021} is an apocalyptic number.

It is an amenable number.

202220202112021 is a deficient number, since it is larger than the sum of its proper divisors (572861762711).

202220202112021 is an equidigital number, since it uses as much as digits as its factorization.

202220202112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572861762710.

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

Adding to 202220202112021 its reverse (120211202022202), we get a palindrome (322431404134223).

The spelling of 202220202112021 in words is "two hundred two trillion, two hundred twenty billion, two hundred two million, one hundred twelve thousand, twenty-one".