111101981579 has 2 divisors, whose sum is σ = 111101981580. Its totient is φ = 111101981578.

The previous prime is 111101981537. The next prime is 111101981581. The reversal of 111101981579 is 975189101111.

It is a strong prime.

It is an emirp because it is prime and its reverse (975189101111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111101981579 - 2²⁸ = 110833546123 is a prime.

Together with 111101981581, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111101981479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550990789 + 55550990790.

It is an arithmetic number, because the mean of its divisors is an integer number (55550990790).

Almost surely, 2^111101981579 is an apocalyptic number.

111101981579 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101981579 is an equidigital number, since it uses as much as digits as its factorization.

111101981579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 44.

The spelling of 111101981579 in words is "one hundred eleven billion, one hundred one million, nine hundred eighty-one thousand, five hundred seventy-nine".