111123021091 has 2 divisors, whose sum is σ = 111123021092. Its totient is φ = 111123021090.

The previous prime is 111123021047. The next prime is 111123021103. The reversal of 111123021091 is 190120321111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111123021091 - 2¹⁵ = 111122988323 is a prime.

It is not a weakly prime, because it can be changed into another prime (111123021391) 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, 55561510545 + 55561510546.

It is an arithmetic number, because the mean of its divisors is an integer number (55561510546).

Almost surely, 2^111123021091 is an apocalyptic number.

111123021091 is a deficient number, since it is larger than the sum of its proper divisors (1).

111123021091 is an equidigital number, since it uses as much as digits as its factorization.

111123021091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 22.

The spelling of 111123021091 in words is "one hundred eleven billion, one hundred twenty-three million, twenty-one thousand, ninety-one".