202222222021 has 2 divisors, whose sum is σ = 202222222022. Its totient is φ = 202222222020.

The previous prime is 202222222009. The next prime is 202222222073. The reversal of 202222222021 is 120222222202.

202222222021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200641284900 + 1580937121 = 447930^2 + 39761^2 .

It is a cyclic number.

It is not a de Polignac number, because 202222222021 - 2⁷ = 202222221893 is a prime.

It is a super-2 number, since 2×202222222021² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 202222222021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202222222721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101111111010 + 101111111011.

It is an arithmetic number, because the mean of its divisors is an integer number (101111111011).

Almost surely, 2^202222222021 is an apocalyptic number.

It is an amenable number.

202222222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202222222021 is an equidigital number, since it uses as much as digits as its factorization.

202222222021 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 202222222021 its reverse (120222222202), we get a palindrome (322444444223).

The spelling of 202222222021 in words is "two hundred two billion, two hundred twenty-two million, two hundred twenty-two thousand, twenty-one".