12321344605521 has 32 divisors (see below), whose sum is σ = 18920400998400. Its totient is φ = 6986395952640.

The previous prime is 12321344605519. The next prime is 12321344605553. The reversal of 12321344605521 is 12550644312321.

12321344605521 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 12321344605521 - 2¹ = 12321344605519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12321344605521.

It is not an unprimeable number, because it can be changed into a prime (12321344605571) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31411320 + ... + 31801158.

It is an arithmetic number, because the mean of its divisors is an integer number (591262531200).

Almost surely, 2^{12321344605521} is an apocalyptic number.

It is an amenable number.

12321344605521 is a deficient number, since it is larger than the sum of its proper divisors (6599056392879).

12321344605521 is a wasteful number, since it uses less digits than its factorization.

12321344605521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401469.

The product of its (nonzero) digits is 172800, while the sum is 39.

Adding to 12321344605521 its reverse (12550644312321), we get a palindrome (24871988917842).

The spelling of 12321344605521 in words is "twelve trillion, three hundred twenty-one billion, three hundred forty-four million, six hundred five thousand, five hundred twenty-one".