22002620021 has 2 divisors, whose sum is σ = 22002620022. Its totient is φ = 22002620020.

The previous prime is 22002619987. The next prime is 22002620053. The reversal of 22002620021 is 12002620022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14818192900 + 7184427121 = 121730^2 + 84761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22002620021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22002620071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11001310010 + 11001310011.

It is an arithmetic number, because the mean of its divisors is an integer number (11001310011).

Almost surely, 2^22002620021 is an apocalyptic number.

It is an amenable number.

22002620021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22002620021 is an equidigital number, since it uses as much as digits as its factorization.

22002620021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

Subtracting from 22002620021 its reverse (12002620022), we obtain a palindrome (9999999999).

The spelling of 22002620021 in words is "twenty-two billion, two million, six hundred twenty thousand, twenty-one".