111101999779 has 2 divisors, whose sum is σ = 111101999780. Its totient is φ = 111101999778.

The previous prime is 111101999773. The next prime is 111101999797. The reversal of 111101999779 is 977999101111.

Together with next prime (111101999797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111101999779 - 2¹⁷ = 111101868707 is a prime.

It is not a weakly prime, because it can be changed into another prime (111101999773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550999889 + 55550999890.

It is an arithmetic number, because the mean of its divisors is an integer number (55550999890).

Almost surely, 2^111101999779 is an apocalyptic number.

111101999779 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101999779 is an equidigital number, since it uses as much as digits as its factorization.

111101999779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 321489, while the sum is 55.

The spelling of 111101999779 in words is "one hundred eleven billion, one hundred one million, nine hundred ninety-nine thousand, seven hundred seventy-nine".