123110122909 has 2 divisors, whose sum is σ = 123110122910. Its totient is φ = 123110122908.

The previous prime is 123110122819. The next prime is 123110122931. The reversal of 123110122909 is 909221011321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123076075684 + 34047225 = 350822^2 + 5835^2 .

It is a cyclic number.

It is not a de Polignac number, because 123110122909 - 2¹⁵ = 123110090141 is a prime.

It is a super-2 number, since 2×123110122909² (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 (123110122999) 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, 61555061454 + 61555061455.

It is an arithmetic number, because the mean of its divisors is an integer number (61555061455).

Almost surely, 2^123110122909 is an apocalyptic number.

It is an amenable number.

123110122909 is a deficient number, since it is larger than the sum of its proper divisors (1).

123110122909 is an equidigital number, since it uses as much as digits as its factorization.

123110122909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 123110122909 in words is "one hundred twenty-three billion, one hundred ten million, one hundred twenty-two thousand, nine hundred nine".