123131122039 has 2 divisors, whose sum is σ = 123131122040. Its totient is φ = 123131122038.

The previous prime is 123131122021. The next prime is 123131122063. The reversal of 123131122039 is 930221131321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123131122039 - 2¹⁵ = 123131089271 is a prime.

It is a super-2 number, since 2×123131122039² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123131121998 and 123131122016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123131122099) 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, 61565561019 + 61565561020.

It is an arithmetic number, because the mean of its divisors is an integer number (61565561020).

Almost surely, 2^123131122039 is an apocalyptic number.

123131122039 is a deficient number, since it is larger than the sum of its proper divisors (1).

123131122039 is an equidigital number, since it uses as much as digits as its factorization.

123131122039 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 123131122039 in words is "one hundred twenty-three billion, one hundred thirty-one million, one hundred twenty-two thousand, thirty-nine".