111112210091 has 2 divisors, whose sum is σ = 111112210092. Its totient is φ = 111112210090.

The previous prime is 111112210073. The next prime is 111112210127. The reversal of 111112210091 is 190012211111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111112210091 is a prime.

It is not a weakly prime, because it can be changed into another prime (111112210021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55556105045 + 55556105046.

It is an arithmetic number, because the mean of its divisors is an integer number (55556105046).

Almost surely, 2^111112210091 is an apocalyptic number.

111112210091 is a deficient number, since it is larger than the sum of its proper divisors (1).

111112210091 is an equidigital number, since it uses as much as digits as its factorization.

111112210091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 20.

The spelling of 111112210091 in words is "one hundred eleven billion, one hundred twelve million, two hundred ten thousand, ninety-one".