111121091 has 2 divisors, whose sum is σ = 111121092. Its totient is φ = 111121090.

The previous prime is 111121079. The next prime is 111121093. The reversal of 111121091 is 190121111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111121091 - 2¹⁰ = 111120067 is a prime.

Together with 111121093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111121093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560545 + 55560546.

It is an arithmetic number, because the mean of its divisors is an integer number (55560546).

Almost surely, 2^111121091 is an apocalyptic number.

111121091 is a deficient number, since it is larger than the sum of its proper divisors (1).

111121091 is an equidigital number, since it uses as much as digits as its factorization.

111121091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 17.

The square root of 111121091 is about 10541.3989109605. The cubic root of 111121091 is about 480.7642498287.

The spelling of 111121091 in words is "one hundred eleven million, one hundred twenty-one thousand, ninety-one".