22120841985997 has 2 divisors, whose sum is σ = 22120841985998. Its totient is φ = 22120841985996.

The previous prime is 22120841985989. The next prime is 22120841986007. The reversal of 22120841985997 is 79958914802122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21895932717481 + 224909268516 = 4679309^2 + 474246^2 .

It is a cyclic number.

It is not a de Polignac number, because 22120841985997 - 2³ = 22120841985989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22120841985947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060420992998 + 11060420992999.

It is an arithmetic number, because the mean of its divisors is an integer number (11060420992999).

Almost surely, 2^{22120841985997} is an apocalyptic number.

It is an amenable number.

22120841985997 is a deficient number, since it is larger than the sum of its proper divisors (1).

22120841985997 is an equidigital number, since it uses as much as digits as its factorization.

22120841985997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52254720, while the sum is 67.

The spelling of 22120841985997 in words is "twenty-two trillion, one hundred twenty billion, eight hundred forty-one million, nine hundred eighty-five thousand, nine hundred ninety-seven".