13331444221 has 4 divisors (see below), whose sum is σ = 14033099200. Its totient is φ = 12629789244.

The previous prime is 13331444219. The next prime is 13331444227. The reversal of 13331444221 is 12244413331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13331444221 - 2¹ = 13331444219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13331444221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13331444227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350827461 + ... + 350827498.

It is an arithmetic number, because the mean of its divisors is an integer number (3508274800).

Almost surely, 2^13331444221 is an apocalyptic number.

It is an amenable number.

13331444221 is a deficient number, since it is larger than the sum of its proper divisors (701654979).

13331444221 is an equidigital number, since it uses as much as digits as its factorization.

13331444221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701654978.

The product of its digits is 6912, while the sum is 28.

Adding to 13331444221 its reverse (12244413331), we get a palindrome (25575857552).

The spelling of 13331444221 in words is "thirteen billion, three hundred thirty-one million, four hundred forty-four thousand, two hundred twenty-one".