22901663221 has 2 divisors, whose sum is σ = 22901663222. Its totient is φ = 22901663220.

The previous prime is 22901663179. The next prime is 22901663233. The reversal of 22901663221 is 12236610922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22348755025 + 552908196 = 149495^2 + 23514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22901663221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22901663321) 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, 11450831610 + 11450831611.

It is an arithmetic number, because the mean of its divisors is an integer number (11450831611).

Almost surely, 2^22901663221 is an apocalyptic number.

It is an amenable number.

22901663221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22901663221 is an equidigital number, since it uses as much as digits as its factorization.

22901663221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 22901663221 in words is "twenty-two billion, nine hundred one million, six hundred sixty-three thousand, two hundred twenty-one".