111105091 has 2 divisors, whose sum is σ = 111105092. Its totient is φ = 111105090.

The previous prime is 111105089. The next prime is 111105143. The reversal of 111105091 is 190501111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111105091 - 2¹ = 111105089 is a prime.

It is a super-2 number, since 2×111105091² = 24688682492236562, which contains 22 as substring.

Together with 111105089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111105011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55552545 + 55552546.

It is an arithmetic number, because the mean of its divisors is an integer number (55552546).

Almost surely, 2^111105091 is an apocalyptic number.

111105091 is a deficient number, since it is larger than the sum of its proper divisors (1).

111105091 is an equidigital number, since it uses as much as digits as its factorization.

111105091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45, while the sum is 19.

The square root of 111105091 is about 10540.6399710833. The cubic root of 111105091 is about 480.7411741097.

The spelling of 111105091 in words is "one hundred eleven million, one hundred five thousand, ninety-one".