111611113 has 2 divisors, whose sum is σ = 111611114. Its totient is φ = 111611112.

The previous prime is 111611099. The next prime is 111611131. The reversal of 111611113 is 311116111.

Together with next prime (111611131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a m-pointer prime, because the next prime (111611131) can be obtained adding 111611113 to its product of digits (18).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78801129 + 32809984 = 8877^2 + 5728^2 .

It is a cyclic number.

It is not a de Polignac number, because 111611113 - 2⁵ = 111611081 is a prime.

It is not a weakly prime, because it can be changed into another prime (111611183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55805556 + 55805557.

It is an arithmetic number, because the mean of its divisors is an integer number (55805557).

Almost surely, 2^111611113 is an apocalyptic number.

It is an amenable number.

111611113 is a deficient number, since it is larger than the sum of its proper divisors (1).

111611113 is an equidigital number, since it uses as much as digits as its factorization.

111611113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18, while the sum is 16.

The square root of 111611113 is about 10564.6160838906. The cubic root of 111611113 is about 481.4699052794.

Adding to 111611113 its reverse (311116111), we get a palindrome (422727224).

The spelling of 111611113 in words is "one hundred eleven million, six hundred eleven thousand, one hundred thirteen".