123103123123 has 4 divisors (see below), whose sum is σ = 128455432848. Its totient is φ = 117750813400.

The previous prime is 123103123109. The next prime is 123103123133. The reversal of 123103123123 is 321321301321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321321301321 = 25679 ⋅12512999.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123103123123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123103123094 and 123103123103.

It is not an unprimeable number, because it can be changed into a prime (123103123133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2676154828 + ... + 2676154873.

It is an arithmetic number, because the mean of its divisors is an integer number (32113858212).

Almost surely, 2^123103123123 is an apocalyptic number.

123103123123 is a deficient number, since it is larger than the sum of its proper divisors (5352309725).

123103123123 is an equidigital number, since it uses as much as digits as its factorization.

123103123123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5352309724.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 123103123123 its reverse (321321301321), we get a palindrome (444424424444).

The spelling of 123103123123 in words is "one hundred twenty-three billion, one hundred three million, one hundred twenty-three thousand, one hundred twenty-three".