111010111020091 has 2 divisors, whose sum is σ = 111010111020092. Its totient is φ = 111010111020090.

The previous prime is 111010111020059. The next prime is 111010111020103. The reversal of 111010111020091 is 190020111010111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111010111020091 - 2⁵ = 111010111020059 is a prime.

It is not a weakly prime, because it can be changed into another prime (111010111020791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505055510045 + 55505055510046.

It is an arithmetic number, because the mean of its divisors is an integer number (55505055510046).

Almost surely, 2^{111010111020091} is an apocalyptic number.

111010111020091 is a deficient number, since it is larger than the sum of its proper divisors (1).

111010111020091 is an equidigital number, since it uses as much as digits as its factorization.

111010111020091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 19.

The spelling of 111010111020091 in words is "one hundred eleven trillion, ten billion, one hundred eleven million, twenty thousand, ninety-one".