122011111979 has 2 divisors, whose sum is σ = 122011111980. Its totient is φ = 122011111978.

The previous prime is 122011111973. The next prime is 122011112017. The reversal of 122011111979 is 979111110221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122011111979 - 2²⁰ = 122010063403 is a prime.

It is a super-2 number, since 2×122011111979² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (122011111973) 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, 61005555989 + 61005555990.

It is an arithmetic number, because the mean of its divisors is an integer number (61005555990).

Almost surely, 2^122011111979 is an apocalyptic number.

122011111979 is a deficient number, since it is larger than the sum of its proper divisors (1).

122011111979 is an equidigital number, since it uses as much as digits as its factorization.

122011111979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 35.

The spelling of 122011111979 in words is "one hundred twenty-two billion, eleven million, one hundred eleven thousand, nine hundred seventy-nine".