111101019979 has 2 divisors, whose sum is σ = 111101019980. Its totient is φ = 111101019978.

The previous prime is 111101019977. The next prime is 111101020061. The reversal of 111101019979 is 979910101111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111101019979 - 2¹ = 111101019977 is a prime.

Together with 111101019977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111101019977) 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, 55550509989 + 55550509990.

It is an arithmetic number, because the mean of its divisors is an integer number (55550509990).

Almost surely, 2^111101019979 is an apocalyptic number.

111101019979 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101019979 is an equidigital number, since it uses as much as digits as its factorization.

111101019979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5103, while the sum is 40.

The spelling of 111101019979 in words is "one hundred eleven billion, one hundred one million, nineteen thousand, nine hundred seventy-nine".