123103031 has 2 divisors, whose sum is σ = 123103032. Its totient is φ = 123103030.

The previous prime is 123103007. The next prime is 123103049. The reversal of 123103031 is 130301321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123103031 is a prime.

It is a super-2 number, since 2×123103031² = 30308712482773922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123102997 and 123103015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123103051) 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, 61551515 + 61551516.

It is an arithmetic number, because the mean of its divisors is an integer number (61551516).

Almost surely, 2^123103031 is an apocalyptic number.

123103031 is a deficient number, since it is larger than the sum of its proper divisors (1).

123103031 is an equidigital number, since it uses as much as digits as its factorization.

123103031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 123103031 is about 11095.1805303023. The cubic root of 123103031 is about 497.4578043891.

Adding to 123103031 its reverse (130301321), we get a palindrome (253404352).

The spelling of 123103031 in words is "one hundred twenty-three million, one hundred three thousand, thirty-one".