13443320221 has 8 divisors (see below), whose sum is σ = 13878975488. Its totient is φ = 13007790000.

The previous prime is 13443320213. The next prime is 13443320291. The reversal of 13443320221 is 12202334431.

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 13443320221 - 2³ = 13443320213 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 (13443320291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219211 + ... + 273751.

It is an arithmetic number, because the mean of its divisors is an integer number (1734871936).

Almost surely, 2^13443320221 is an apocalyptic number.

It is an amenable number.

13443320221 is a deficient number, since it is larger than the sum of its proper divisors (435655267).

13443320221 is an equidigital number, since it uses as much as digits as its factorization.

13443320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62523.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 13443320221 its reverse (12202334431), we get a palindrome (25645654652).

The spelling of 13443320221 in words is "thirteen billion, four hundred forty-three million, three hundred twenty thousand, two hundred twenty-one".