111200019979 has 2 divisors, whose sum is σ = 111200019980. Its totient is φ = 111200019978.

The previous prime is 111200019977. The next prime is 111200020049. The reversal of 111200019979 is 979910002111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111200019979 - 2¹ = 111200019977 is a prime.

Together with 111200019977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111200019977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55600009989 + 55600009990.

It is an arithmetic number, because the mean of its divisors is an integer number (55600009990).

Almost surely, 2^111200019979 is an apocalyptic number.

111200019979 is a deficient number, since it is larger than the sum of its proper divisors (1).

111200019979 is an equidigital number, since it uses as much as digits as its factorization.

111200019979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 40.

The spelling of 111200019979 in words is "one hundred eleven billion, two hundred million, nineteen thousand, nine hundred seventy-nine".