12123121224 has 32 divisors (see below), whose sum is σ = 30310967520. Its totient is φ = 4040618496.

The previous prime is 12123121201. The next prime is 12123121289. The reversal of 12123121224 is 42212132121.

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 12123121224.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281767 + ... + 321929.

It is an arithmetic number, because the mean of its divisors is an integer number (947217735).

Almost surely, 2^12123121224 is an apocalyptic number.

It is an amenable number.

12123121224 is an abundant number, since it is smaller than the sum of its proper divisors (18187846296).

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

12123121224 is a wasteful number, since it uses less digits than its factorization.

12123121224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52749 (or 52745 counting only the distinct ones).

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

Adding to 12123121224 its reverse (42212132121), we get a palindrome (54335253345).

The spelling of 12123121224 in words is "twelve billion, one hundred twenty-three million, one hundred twenty-one thousand, two hundred twenty-four".