123120043403 has 12 divisors (see below), whose sum is σ = 143415121320. Its totient is φ = 105388631712.

The previous prime is 123120043399. The next prime is 123120043421. The reversal of 123120043403 is 304340021321.

It is not a de Polignac number, because 123120043403 - 2² = 123120043399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123120043493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1663826 + ... + 1736247.

It is an arithmetic number, because the mean of its divisors is an integer number (11951260110).

Almost surely, 2^123120043403 is an apocalyptic number.

123120043403 is a deficient number, since it is larger than the sum of its proper divisors (20295077917).

123120043403 is an equidigital number, since it uses as much as digits as its factorization.

123120043403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3400826 (or 3400819 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 123120043403 its reverse (304340021321), we get a palindrome (427460064724).

The spelling of 123120043403 in words is "one hundred twenty-three billion, one hundred twenty million, forty-three thousand, four hundred three".