12324320521 has 4 divisors (see below), whose sum is σ = 12327127812. Its totient is φ = 12321513232.

The previous prime is 12324320507. The next prime is 12324320539. The reversal of 12324320521 is 12502342321.

12324320521 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 can be written as a sum of positive squares in 2 ways, for example, as 3462734025 + 8861586496 = 58845^2 + 94136^2 .

It is a cyclic number.

It is not a de Polignac number, because 12324320521 - 2³³ = 3734385929 is a prime.

It is a super-2 number, since 2×12324320521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12324330521) 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, 1397050 + ... + 1405843.

It is an arithmetic number, because the mean of its divisors is an integer number (3081781953).

Almost surely, 2^12324320521 is an apocalyptic number.

It is an amenable number.

12324320521 is a deficient number, since it is larger than the sum of its proper divisors (2807291).

12324320521 is an equidigital number, since it uses as much as digits as its factorization.

12324320521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807290.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 12324320521 its reverse (12502342321), we get a palindrome (24826662842).

The spelling of 12324320521 in words is "twelve billion, three hundred twenty-four million, three hundred twenty thousand, five hundred twenty-one".