123123113123 has 2 divisors, whose sum is σ = 123123113124. Its totient is φ = 123123113122.

The previous prime is 123123113107. The next prime is 123123113129. The reversal of 123123113123 is 321311321321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123123113123 - 2⁴ = 123123113107 is a prime.

It is not a weakly prime, because it can be changed into another prime (123123113129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61561556561 + 61561556562.

It is an arithmetic number, because the mean of its divisors is an integer number (61561556562).

Almost surely, 2^123123113123 is an apocalyptic number.

123123113123 is a deficient number, since it is larger than the sum of its proper divisors (1).

123123113123 is an equidigital number, since it uses as much as digits as its factorization.

123123113123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

Adding to 123123113123 its reverse (321311321321), we get a palindrome (444434434444).

The spelling of 123123113123 in words is "one hundred twenty-three billion, one hundred twenty-three million, one hundred thirteen thousand, one hundred twenty-three".