1123210091 has 2 divisors, whose sum is σ = 1123210092. Its totient is φ = 1123210090.

The previous prime is 1123210063. The next prime is 1123210093. The reversal of 1123210091 is 1900123211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1123210091 - 2²⁶ = 1056101227 is a prime.

Together with 1123210093, 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 (1123210093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561605045 + 561605046.

It is an arithmetic number, because the mean of its divisors is an integer number (561605046).

Almost surely, 2^1123210091 is an apocalyptic number.

1123210091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123210091 is an equidigital number, since it uses as much as digits as its factorization.

1123210091 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 20.

The square root of 1123210091 is about 33514.3266529405. The cubic root of 1123210091 is about 1039.4900393694.

The spelling of 1123210091 in words is "one billion, one hundred twenty-three million, two hundred ten thousand, ninety-one".