22200202221997 has 2 divisors, whose sum is σ = 22200202221998. Its totient is φ = 22200202221996.

The previous prime is 22200202221991. The next prime is 22200202222027. The reversal of 22200202221997 is 79912220200222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21114659114761 + 1085543107236 = 4595069^2 + 1041894^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22200202221997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22200202221991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11100101110998 + 11100101110999.

It is an arithmetic number, because the mean of its divisors is an integer number (11100101110999).

Almost surely, 2^{22200202221997} is an apocalyptic number.

It is an amenable number.

22200202221997 is a deficient number, since it is larger than the sum of its proper divisors (1).

22200202221997 is an equidigital number, since it uses as much as digits as its factorization.

22200202221997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 22200202221997 in words is "twenty-two trillion, two hundred billion, two hundred two million, two hundred twenty-one thousand, nine hundred ninety-seven".