22200220202021 has 2 divisors, whose sum is σ = 22200220202022. Its totient is φ = 22200220202020.

The previous prime is 22200220201981. The next prime is 22200220202071. The reversal of 22200220202021 is 12020202200222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16612031517796 + 5588188684225 = 4075786^2 + 2363935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22200220202021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22200220202071) 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, 11100110101010 + 11100110101011.

It is an arithmetic number, because the mean of its divisors is an integer number (11100110101011).

Almost surely, 2^{22200220202021} is an apocalyptic number.

It is an amenable number.

22200220202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22200220202021 is an equidigital number, since it uses as much as digits as its factorization.

22200220202021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 22200220202021 its reverse (12020202200222), we get a palindrome (34220422402243).

The spelling of 22200220202021 in words is "twenty-two trillion, two hundred billion, two hundred twenty million, two hundred two thousand, twenty-one".