111122211979 has 2 divisors, whose sum is σ = 111122211980. Its totient is φ = 111122211978.

The previous prime is 111122211961. The next prime is 111122212007. The reversal of 111122211979 is 979112221111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111122211979 - 2⁵ = 111122211947 is a prime.

It is a super-2 number, since 2×111122211979² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111122212979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55561105989 + 55561105990.

It is an arithmetic number, because the mean of its divisors is an integer number (55561105990).

Almost surely, 2^111122211979 is an apocalyptic number.

111122211979 is a deficient number, since it is larger than the sum of its proper divisors (1).

111122211979 is an equidigital number, since it uses as much as digits as its factorization.

111122211979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 37.

The spelling of 111122211979 in words is "one hundred eleven billion, one hundred twenty-two million, two hundred eleven thousand, nine hundred seventy-nine".