111009999979 has 2 divisors, whose sum is σ = 111009999980. Its totient is φ = 111009999978.

The previous prime is 111009999959. The next prime is 111010000009. The reversal of 111009999979 is 979999900111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111009999979 - 2¹⁹ = 111009475691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111009999979.

It is not a weakly prime, because it can be changed into another prime (111009999929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55504999989 + 55504999990.

It is an arithmetic number, because the mean of its divisors is an integer number (55504999990).

Almost surely, 2^111009999979 is an apocalyptic number.

111009999979 is a deficient number, since it is larger than the sum of its proper divisors (1).

111009999979 is an equidigital number, since it uses as much as digits as its factorization.

111009999979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3720087, while the sum is 64.

The spelling of 111009999979 in words is "one hundred eleven billion, nine million, nine hundred ninety-nine thousand, nine hundred seventy-nine".