12123404432 has 20 divisors (see below), whose sum is σ = 23668406256. Its totient is φ = 6015428640.

The previous prime is 12123404413. The next prime is 12123404437. The reversal of 12123404432 is 23440432121.

It is not an unprimeable number, because it can be changed into a prime (12123404437) 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, 2889938 + ... + 2894129.

Almost surely, 2^12123404432 is an apocalyptic number.

It is an amenable number.

12123404432 is a deficient number, since it is larger than the sum of its proper divisors (11545001824).

12123404432 is a wasteful number, since it uses less digits than its factorization.

12123404432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5784206 (or 5784200 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 12123404432 its reverse (23440432121), we get a palindrome (35563836553).

The spelling of 12123404432 in words is "twelve billion, one hundred twenty-three million, four hundred four thousand, four hundred thirty-two".