123122100123 has 48 divisors (see below), whose sum is σ = 194695488000. Its totient is φ = 74356563840.

The previous prime is 123122100071. The next prime is 123122100149. The reversal of 123122100123 is 321001221321.

It is not a de Polignac number, because 123122100123 - 2¹⁰ = 123122099099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123122100096 and 123122100105.

It is not an unprimeable number, because it can be changed into a prime (123122100523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38366143 + ... + 38369351.

It is an arithmetic number, because the mean of its divisors is an integer number (4056156000).

Almost surely, 2^123122100123 is an apocalyptic number.

123122100123 is a deficient number, since it is larger than the sum of its proper divisors (71573387877).

123122100123 is a wasteful number, since it uses less digits than its factorization.

123122100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4472 (or 4469 counting only the distinct ones).

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

Adding to 123122100123 its reverse (321001221321), we get a palindrome (444123321444).

The spelling of 123122100123 in words is "one hundred twenty-three billion, one hundred twenty-two million, one hundred thousand, one hundred twenty-three".