111082091 has 2 divisors, whose sum is σ = 111082092. Its totient is φ = 111082090.

The previous prime is 111082067. The next prime is 111082109. The reversal of 111082091 is 190280111.

Together with next prime (111082109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111082091 - 2²⁶ = 43973227 is a prime.

It is not a weakly prime, because it can be changed into another prime (111082001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55541045 + 55541046.

It is an arithmetic number, because the mean of its divisors is an integer number (55541046).

Almost surely, 2^111082091 is an apocalyptic number.

111082091 is a deficient number, since it is larger than the sum of its proper divisors (1).

111082091 is an equidigital number, since it uses as much as digits as its factorization.

111082091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

The square root of 111082091 is about 10539.5488992651. The cubic root of 111082091 is about 480.7079988820.

The spelling of 111082091 in words is "one hundred eleven million, eighty-two thousand, ninety-one".