13404344221 has 8 divisors (see below), whose sum is σ = 13430159424. Its totient is φ = 13378548480.

The previous prime is 13404344207. The next prime is 13404344237. The reversal of 13404344221 is 12244340431.

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 13404344221 - 2¹¹ = 13404342173 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 13404344221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13404344281) 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, 2460861 + ... + 2466301.

It is an arithmetic number, because the mean of its divisors is an integer number (1678769928).

Almost surely, 2^13404344221 is an apocalyptic number.

It is an amenable number.

13404344221 is a deficient number, since it is larger than the sum of its proper divisors (25815203).

13404344221 is an equidigital number, since it uses as much as digits as its factorization.

13404344221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9731.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 13404344221 its reverse (12244340431), we get a palindrome (25648684652).

The spelling of 13404344221 in words is "thirteen billion, four hundred four million, three hundred forty-four thousand, two hundred twenty-one".