22221212220979 has 2 divisors, whose sum is σ = 22221212220980. Its totient is φ = 22221212220978.

The previous prime is 22221212220943. The next prime is 22221212221057. The reversal of 22221212220979 is 97902221212222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22221212220979 - 2²⁹ = 22220675350067 is a prime.

It is not a weakly prime, because it can be changed into another prime (22221212220679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110606110489 + 11110606110490.

It is an arithmetic number, because the mean of its divisors is an integer number (11110606110490).

Almost surely, 2^{22221212220979} is an apocalyptic number.

22221212220979 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221212220979 is an equidigital number, since it uses as much as digits as its factorization.

22221212220979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 22221212220979 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred twelve million, two hundred twenty thousand, nine hundred seventy-nine".