22021009979 has 2 divisors, whose sum is σ = 22021009980. Its totient is φ = 22021009978.

The previous prime is 22021009957. The next prime is 22021010057. The reversal of 22021009979 is 97990012022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22021009979 - 2⁸ = 22021009723 is a prime.

It is not a weakly prime, because it can be changed into another prime (22021002979) 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, 11010504989 + 11010504990.

It is an arithmetic number, because the mean of its divisors is an integer number (11010504990).

Almost surely, 2^22021009979 is an apocalyptic number.

22021009979 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021009979 is an equidigital number, since it uses as much as digits as its factorization.

22021009979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 22021009979 in words is "twenty-two billion, twenty-one million, nine thousand, nine hundred seventy-nine".