111005511121 has 2 divisors, whose sum is σ = 111005511122. Its totient is φ = 111005511120.

The previous prime is 111005511007. The next prime is 111005511139. The reversal of 111005511121 is 121115500111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84774145600 + 26231365521 = 291160^2 + 161961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111005511121 is a prime.

It is not a weakly prime, because it can be changed into another prime (111005518121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55502755560 + 55502755561.

It is an arithmetic number, because the mean of its divisors is an integer number (55502755561).

Almost surely, 2^111005511121 is an apocalyptic number.

It is an amenable number.

111005511121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111005511121 is an equidigital number, since it uses as much as digits as its factorization.

111005511121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50, while the sum is 19.

The spelling of 111005511121 in words is "one hundred eleven billion, five million, five hundred eleven thousand, one hundred twenty-one".