22121100979 has 2 divisors, whose sum is σ = 22121100980. Its totient is φ = 22121100978.

The previous prime is 22121100973. The next prime is 22121101007. The reversal of 22121100979 is 97900112122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22121100979 - 2³ = 22121100971 is a prime.

It is a super-2 number, since 2×22121100979² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22121100971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060550489 + 11060550490.

It is an arithmetic number, because the mean of its divisors is an integer number (11060550490).

Almost surely, 2^22121100979 is an apocalyptic number.

22121100979 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121100979 is an equidigital number, since it uses as much as digits as its factorization.

22121100979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 34.

The spelling of 22121100979 in words is "twenty-two billion, one hundred twenty-one million, one hundred thousand, nine hundred seventy-nine".