123110102191 has 2 divisors, whose sum is σ = 123110102192. Its totient is φ = 123110102190.

The previous prime is 123110102177. The next prime is 123110102209. The reversal of 123110102191 is 191201011321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123110102191 - 2²⁷ = 122975884463 is a prime.

It is a super-2 number, since 2×123110102191² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123110102111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61555051095 + 61555051096.

It is an arithmetic number, because the mean of its divisors is an integer number (61555051096).

Almost surely, 2^123110102191 is an apocalyptic number.

123110102191 is a deficient number, since it is larger than the sum of its proper divisors (1).

123110102191 is an equidigital number, since it uses as much as digits as its factorization.

123110102191 is an evil number, because the sum of its binary digits is even.

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

The spelling of 123110102191 in words is "one hundred twenty-three billion, one hundred ten million, one hundred two thousand, one hundred ninety-one".