111012209979 has 16 divisors (see below), whose sum is σ = 164209127040. Its totient is φ = 66139784960.

The previous prime is 111012209953. The next prime is 111012210011. The reversal of 111012209979 is 979902210111.

It is a cyclic number.

It is not a de Polignac number, because 111012209979 - 2⁷ = 111012209851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111012209979.

It is not an unprimeable number, because it can be changed into a prime (111012209479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28506582 + ... + 28510475.

It is an arithmetic number, because the mean of its divisors is an integer number (10263070440).

Almost surely, 2^111012209979 is an apocalyptic number.

111012209979 is a deficient number, since it is larger than the sum of its proper divisors (53196917061).

111012209979 is a wasteful number, since it uses less digits than its factorization.

111012209979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57017130.

The product of its (nonzero) digits is 20412, while the sum is 42.

The spelling of 111012209979 in words is "one hundred eleven billion, twelve million, two hundred nine thousand, nine hundred seventy-nine".