12342432321 has 16 divisors (see below), whose sum is σ = 18674131200. Its totient is φ = 8053217424.

The previous prime is 12342432317. The next prime is 12342432341. The reversal of 12342432321 is 12323424321.

12342432321 is a `hidden beast` number, since 1 + 2 + 3 + 424 + 3 + 232 + 1 = 666.

12342432321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12342432321 - 2² = 12342432317 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12342432341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4861786 + ... + 4864323.

It is an arithmetic number, because the mean of its divisors is an integer number (1167133200).

Almost surely, 2^12342432321 is an apocalyptic number.

It is an amenable number.

12342432321 is a deficient number, since it is larger than the sum of its proper divisors (6331698879).

12342432321 is an equidigital number, since it uses as much as digits as its factorization.

12342432321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9726165 (or 9726159 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 12342432321 its reverse (12323424321), we get a palindrome (24665856642).

The spelling of 12342432321 in words is "twelve billion, three hundred forty-two million, four hundred thirty-two thousand, three hundred twenty-one".