12321040443 has 4 divisors (see below), whose sum is σ = 16428053928. Its totient is φ = 8214026960.

The previous prime is 12321040379. The next prime is 12321040469. The reversal of 12321040443 is 34404012321.

12321040443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12321040443 - 2⁶ = 12321040379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12321040483) 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 3 ways as a sum of consecutive naturals, for example, 2053506738 + ... + 2053506743.

It is an arithmetic number, because the mean of its divisors is an integer number (4107013482).

Almost surely, 2^12321040443 is an apocalyptic number.

12321040443 is a deficient number, since it is larger than the sum of its proper divisors (4107013485).

12321040443 is an equidigital number, since it uses as much as digits as its factorization.

12321040443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107013484.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 12321040443 its reverse (34404012321), we get a palindrome (46725052764).

The spelling of 12321040443 in words is "twelve billion, three hundred twenty-one million, forty thousand, four hundred forty-three".