12123132224 has 56 divisors (see below), whose sum is σ = 27903952320. Its totient is φ = 5118068736.

The previous prime is 12123132223. The next prime is 12123132289. The reversal of 12123132224 is 42223132121.

It is a tau number, because it is divible by the number of its divisors (56).

It is a self number, because there is not a number n which added to its sum of digits gives 12123132224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123132223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171929 + ... + 231960.

Almost surely, 2^12123132224 is an apocalyptic number.

12123132224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12123132224 is an abundant number, since it is smaller than the sum of its proper divisors (15780820096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12123132224 is an equidigital number, since it uses as much as digits as its factorization.

12123132224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403975 (or 403965 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

Adding to 12123132224 its reverse (42223132121), we get a palindrome (54346264345).

The spelling of 12123132224 in words is "twelve billion, one hundred twenty-three million, one hundred thirty-two thousand, two hundred twenty-four".