12443213221 has 8 divisors (see below), whose sum is σ = 13320122400. Its totient is φ = 11588504400.

The previous prime is 12443213213. The next prime is 12443213269. The reversal of 12443213221 is 12231234421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12443213221 - 2³ = 12443213213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12443213521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5548930 + ... + 5551171.

It is an arithmetic number, because the mean of its divisors is an integer number (1665015300).

Almost surely, 2^12443213221 is an apocalyptic number.

It is an amenable number.

12443213221 is a deficient number, since it is larger than the sum of its proper divisors (876909179).

12443213221 is a wasteful number, since it uses less digits than its factorization.

12443213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11100179.

The product of its digits is 2304, while the sum is 25.

Adding to 12443213221 its reverse (12231234421), we get a palindrome (24674447642).

The spelling of 12443213221 in words is "twelve billion, four hundred forty-three million, two hundred thirteen thousand, two hundred twenty-one".