12243134421 has 64 divisors (see below), whose sum is σ = 21565440000. Its totient is φ = 6716558016.

The previous prime is 12243134413. The next prime is 12243134437. The reversal of 12243134421 is 12443134221.

12243134421 is a `hidden beast` number, since 1 + 224 + 3 + 13 + 4 + 421 = 666.

It is not a de Polignac number, because 12243134421 - 2³ = 12243134413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12243134411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 974860 + ... + 987338.

It is an arithmetic number, because the mean of its divisors is an integer number (336960000).

Almost surely, 2^12243134421 is an apocalyptic number.

It is an amenable number.

12243134421 is a deficient number, since it is larger than the sum of its proper divisors (9322305579).

12243134421 is a wasteful number, since it uses less digits than its factorization.

12243134421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12703 (or 12697 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 12243134421 its reverse (12443134221), we get a palindrome (24686268642).

The spelling of 12243134421 in words is "twelve billion, two hundred forty-three million, one hundred thirty-four thousand, four hundred twenty-one".