222202220200021 has 2 divisors, whose sum is σ = 222202220200022. Its totient is φ = 222202220200020.

The previous prime is 222202220199983. The next prime is 222202220200027. The reversal of 222202220200021 is 120002022202222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137090986119396 + 85111234080625 = 11708586^2 + 9225575^2 .

It is a cyclic number.

It is not a de Polignac number, because 222202220200021 - 2¹⁵ = 222202220167253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222202220200027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111101110100010 + 111101110100011.

It is an arithmetic number, because the mean of its divisors is an integer number (111101110100011).

Almost surely, 2^{222202220200021} is an apocalyptic number.

It is an amenable number.

222202220200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222202220200021 is an equidigital number, since it uses as much as digits as its factorization.

222202220200021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 222202220200021 its reverse (120002022202222), we get a palindrome (342204242402243).

The spelling of 222202220200021 in words is "two hundred twenty-two trillion, two hundred two billion, two hundred twenty million, two hundred thousand, twenty-one".