12324340021 has 16 divisors (see below), whose sum is σ = 14558532480. Its totient is φ = 10214412480.

The previous prime is 12324340013. The next prime is 12324340031. The reversal of 12324340021 is 12004342321.

12324340021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12324340021 - 2³ = 12324340013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12324339974 and 12324340001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12324340031) 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, 219406 + ... + 269791.

It is an arithmetic number, because the mean of its divisors is an integer number (909908280).

Almost surely, 2^12324340021 is an apocalyptic number.

It is an amenable number.

12324340021 is a deficient number, since it is larger than the sum of its proper divisors (2234192459).

12324340021 is an equidigital number, since it uses as much as digits as its factorization.

12324340021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489324.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 12324340021 its reverse (12004342321), we get a palindrome (24328682342).

The spelling of 12324340021 in words is "twelve billion, three hundred twenty-four million, three hundred forty thousand, twenty-one".