22121658959 has 2 divisors, whose sum is σ = 22121658960. Its totient is φ = 22121658958.

The previous prime is 22121658929. The next prime is 22121658961. The reversal of 22121658959 is 95985612122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121658959 is a prime.

It is a Sophie Germain prime.

Together with 22121658961, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121658929) 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, 11060829479 + 11060829480.

It is an arithmetic number, because the mean of its divisors is an integer number (11060829480).

Almost surely, 2^22121658959 is an apocalyptic number.

22121658959 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121658959 is an equidigital number, since it uses as much as digits as its factorization.

22121658959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 50.

The spelling of 22121658959 in words is "twenty-two billion, one hundred twenty-one million, six hundred fifty-eight thousand, nine hundred fifty-nine".