123123121039 has 2 divisors, whose sum is σ = 123123121040. Its totient is φ = 123123121038.

The previous prime is 123123121007. The next prime is 123123121063. The reversal of 123123121039 is 930121321321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123123121039 - 2⁵ = 123123121007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123123120998 and 123123121016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123123121939) 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, 61561560519 + 61561560520.

It is an arithmetic number, because the mean of its divisors is an integer number (61561560520).

Almost surely, 2^123123121039 is an apocalyptic number.

123123121039 is a deficient number, since it is larger than the sum of its proper divisors (1).

123123121039 is an equidigital number, since it uses as much as digits as its factorization.

123123121039 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 28.

The spelling of 123123121039 in words is "one hundred twenty-three billion, one hundred twenty-three million, one hundred twenty-one thousand, thirty-nine".