22121000979929 has 2 divisors, whose sum is σ = 22121000979930. Its totient is φ = 22121000979928.

The previous prime is 22121000979817. The next prime is 22121000979943. The reversal of 22121000979929 is 92997900012122.

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., 20145303675904 + 1975697304025 = 4488352^2 + 1405595^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121000979929 - 2¹⁶ = 22121000914393 is a prime.

It is not a weakly prime, because it can be changed into another prime (22121000978929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060500489964 + 11060500489965.

It is an arithmetic number, because the mean of its divisors is an integer number (11060500489965).

Almost surely, 2^{22121000979929} is an apocalyptic number.

It is an amenable number.

22121000979929 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121000979929 is an equidigital number, since it uses as much as digits as its factorization.

22121000979929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 53.

The spelling of 22121000979929 in words is "twenty-two trillion, one hundred twenty-one billion, nine hundred seventy-nine thousand, nine hundred twenty-nine".