22120841985989 has 2 divisors, whose sum is σ = 22120841985990. Its totient is φ = 22120841985988.

The previous prime is 22120841985961. The next prime is 22120841985997. The reversal of 22120841985989 is 98958914802122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21179278389025 + 941563596964 = 4602095^2 + 970342^2 .

It is a cyclic number.

It is not a de Polignac number, because 22120841985989 - 2³⁶ = 22052122509253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22120841982989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060420992994 + 11060420992995.

It is an arithmetic number, because the mean of its divisors is an integer number (11060420992995).

Almost surely, 2^{22120841985989} is an apocalyptic number.

It is an amenable number.

22120841985989 is a deficient number, since it is larger than the sum of its proper divisors (1).

22120841985989 is an equidigital number, since it uses as much as digits as its factorization.

22120841985989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 59719680, while the sum is 68.

The spelling of 22120841985989 in words is "twenty-two trillion, one hundred twenty billion, eight hundred forty-one million, nine hundred eighty-five thousand, nine hundred eighty-nine".