202202112200021 has 2 divisors, whose sum is σ = 202202112200022. Its totient is φ = 202202112200020.

The previous prime is 202202112200003. The next prime is 202202112200063. The reversal of 202202112200021 is 120002211202202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110759080317796 + 91443031882225 = 10524214^2 + 9562585^2 .

It is a cyclic number.

It is not a de Polignac number, because 202202112200021 - 2⁶ = 202202112199957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202202112200521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101101056100010 + 101101056100011.

It is an arithmetic number, because the mean of its divisors is an integer number (101101056100011).

Almost surely, 2^{202202112200021} is an apocalyptic number.

It is an amenable number.

202202112200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202202112200021 is an equidigital number, since it uses as much as digits as its factorization.

202202112200021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202202112200021 its reverse (120002211202202), we get a palindrome (322204323402223).

The spelling of 202202112200021 in words is "two hundred two trillion, two hundred two billion, one hundred twelve million, two hundred thousand, twenty-one".