111611005111 has 2 divisors, whose sum is σ = 111611005112. Its totient is φ = 111611005110.

The previous prime is 111611005061. The next prime is 111611005123. The reversal of 111611005111 is 111500116111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111611005111 - 2⁷ = 111611004983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111611005171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55805502555 + 55805502556.

It is an arithmetic number, because the mean of its divisors is an integer number (55805502556).

Almost surely, 2^111611005111 is an apocalyptic number.

111611005111 is a deficient number, since it is larger than the sum of its proper divisors (1).

111611005111 is an equidigital number, since it uses as much as digits as its factorization.

111611005111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 19.

The spelling of 111611005111 in words is "one hundred eleven billion, six hundred eleven million, five thousand, one hundred eleven".