12443230421321 has 32 divisors (see below), whose sum is σ = 14392018206720. Its totient is φ = 10537631424000.

The previous prime is 12443230421311. The next prime is 12443230421359. The reversal of 12443230421321 is 12312403234421.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12443230421321 - 2⁴² = 8045183910217 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12443230421311) 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 31 ways as a sum of consecutive naturals, for example, 1030830716 + ... + 1030842786.

It is an arithmetic number, because the mean of its divisors is an integer number (449750568960).

Almost surely, 2^{12443230421321} is an apocalyptic number.

It is an amenable number.

12443230421321 is a deficient number, since it is larger than the sum of its proper divisors (1948787785399).

12443230421321 is a wasteful number, since it uses less digits than its factorization.

12443230421321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14645.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 12443230421321 its reverse (12312403234421), we get a palindrome (24755633655742).

The spelling of 12443230421321 in words is "twelve trillion, four hundred forty-three billion, two hundred thirty million, four hundred twenty-one thousand, three hundred twenty-one".