12321320232 has 32 divisors (see below), whose sum is σ = 33172786080. Its totient is φ = 3791175360.

The previous prime is 12321320227. The next prime is 12321320239. The reversal of 12321320232 is 23202312321.

It is a happy number.

12321320232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12321320199 and 12321320208.

It is not an unprimeable number, because it can be changed into a prime (12321320239) 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 7 ways as a sum of consecutive naturals, for example, 19745394 + ... + 19746017.

It is an arithmetic number, because the mean of its divisors is an integer number (1036649565).

Almost surely, 2^12321320232 is an apocalyptic number.

12321320232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12321320232 is an abundant number, since it is smaller than the sum of its proper divisors (20851465848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12321320232 is a wasteful number, since it uses less digits than its factorization.

12321320232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39491433 (or 39491429 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 12321320232 its reverse (23202312321), we get a palindrome (35523632553).

The spelling of 12321320232 in words is "twelve billion, three hundred twenty-one million, three hundred twenty thousand, two hundred thirty-two".