12121224232 has 32 divisors (see below), whose sum is σ = 24937363080. Its totient is φ = 5488853760.

The previous prime is 12121224187. The next prime is 12121224239. The reversal of 12121224232 is 23242212121.

It can be written as a sum of positive squares in 4 ways, for example, as 9581668996 + 2539555236 = 97886^2 + 50394^2 .

It is not an unprimeable number, because it can be changed into a prime (12121224239) 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, 1094019 + ... + 1105042.

Almost surely, 2^12121224232 is an apocalyptic number.

It is an amenable number.

12121224232 is an abundant number, since it is smaller than the sum of its proper divisors (12816138848).

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

12121224232 is a wasteful number, since it uses less digits than its factorization.

12121224232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199133 (or 2199129 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

Adding to 12121224232 its reverse (23242212121), we get a palindrome (35363436353).

The spelling of 12121224232 in words is "twelve billion, one hundred twenty-one million, two hundred twenty-four thousand, two hundred thirty-two".