12121231224 has 16 divisors (see below), whose sum is σ = 30303078120. Its totient is φ = 4040410400.

The previous prime is 12121231211. The next prime is 12121231261. The reversal of 12121231224 is 42213212121.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 12121231224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252525627 + ... + 252525674.

Almost surely, 2^12121231224 is an apocalyptic number.

It is an amenable number.

12121231224 is an abundant number, since it is smaller than the sum of its proper divisors (18181846896).

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

12121231224 is a wasteful number, since it uses less digits than its factorization.

12121231224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505051310 (or 505051306 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

Adding to 12121231224 its reverse (42213212121), we get a palindrome (54334443345).

The spelling of 12121231224 in words is "twelve billion, one hundred twenty-one million, two hundred thirty-one thousand, two hundred twenty-four".