123123031 has 2 divisors, whose sum is σ = 123123032. Its totient is φ = 123123030.

The previous prime is 123123023. The next prime is 123123043. The reversal of 123123031 is 130321321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123123031 - 2³ = 123123023 is a prime.

It is a super-2 number, since 2×123123031² = 30318561525253922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123122996 and 123123014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123123631) 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, 61561515 + 61561516.

It is an arithmetic number, because the mean of its divisors is an integer number (61561516).

Almost surely, 2^123123031 is an apocalyptic number.

123123031 is a deficient number, since it is larger than the sum of its proper divisors (1).

123123031 is an equidigital number, since it uses as much as digits as its factorization.

123123031 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 16.

The square root of 123123031 is about 11096.0817859279. The cubic root of 123123031 is about 497.4847428467.

Adding to 123123031 its reverse (130321321), we get a palindrome (253444352).

The spelling of 123123031 in words is "one hundred twenty-three million, one hundred twenty-three thousand, thirty-one".