123210120123 has 24 divisors (see below), whose sum is σ = 178576070400. Its totient is φ = 81860855040.

The previous prime is 123210120073. The next prime is 123210120151. The reversal of 123210120123 is 321021012321.

It is not a de Polignac number, because 123210120123 - 2⁹ = 123210119611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123210120096 and 123210120105.

It is not an unprimeable number, because it can be changed into a prime (123210120823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3650278 + ... + 3683876.

It is an arithmetic number, because the mean of its divisors is an integer number (7440669600).

Almost surely, 2^123210120123 is an apocalyptic number.

123210120123 is a deficient number, since it is larger than the sum of its proper divisors (55365950277).

123210120123 is a wasteful number, since it uses less digits than its factorization.

123210120123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34979 (or 34976 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 123210120123 its reverse (321021012321), we get a palindrome (444231132444).

The spelling of 123210120123 in words is "one hundred twenty-three billion, two hundred ten million, one hundred twenty thousand, one hundred twenty-three".