12432443121 has 36 divisors (see below), whose sum is σ = 20944714752. Its totient is φ = 7085607984.

The previous prime is 12432443119. The next prime is 12432443129. The reversal of 12432443121 is 12134423421.

12432443121 is a `hidden beast` number, since 1 + 24 + 324 + 4 + 312 + 1 = 666.

It is not a de Polignac number, because 12432443121 - 2¹ = 12432443119 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12432443129) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 132100 + ... + 205706.

It is an arithmetic number, because the mean of its divisors is an integer number (581797632).

Almost surely, 2^12432443121 is an apocalyptic number.

It is an amenable number.

12432443121 is a deficient number, since it is larger than the sum of its proper divisors (8512271631).

12432443121 is a wasteful number, since it uses less digits than its factorization.

12432443121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74010 (or 74000 counting only the distinct ones).

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

Adding to 12432443121 its reverse (12134423421), we get a palindrome (24566866542).

The spelling of 12432443121 in words is "twelve billion, four hundred thirty-two million, four hundred forty-three thousand, one hundred twenty-one".