123113503031 has 2 divisors, whose sum is σ = 123113503032. Its totient is φ = 123113503030.

The previous prime is 123113503021. The next prime is 123113503147. The reversal of 123113503031 is 130305311321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123113503031 is a prime.

It is a super-2 number, since 2×123113503031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123113502988 and 123113503006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123113503021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61556751515 + 61556751516.

It is an arithmetic number, because the mean of its divisors is an integer number (61556751516).

Almost surely, 2^123113503031 is an apocalyptic number.

123113503031 is a deficient number, since it is larger than the sum of its proper divisors (1).

123113503031 is an equidigital number, since it uses as much as digits as its factorization.

123113503031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 23.

Adding to 123113503031 its reverse (130305311321), we get a palindrome (253418814352).

The spelling of 123113503031 in words is "one hundred twenty-three billion, one hundred thirteen million, five hundred three thousand, thirty-one".