13113221 has 8 divisors (see below), whose sum is σ = 14340000. Its totient is φ = 11892240.

The previous prime is 13113181. The next prime is 13113223. The reversal of 13113221 is 12231131.

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 13113221 - 2¹⁸ = 12851077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13113196 and 13113205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13113223) 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, 4295 + ... + 6683.

It is an arithmetic number, because the mean of its divisors is an integer number (1792500).

Almost surely, 2^13113221 is an apocalyptic number.

13113221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13113221 is a deficient number, since it is larger than the sum of its proper divisors (1226779).

13113221 is a wasteful number, since it uses less digits than its factorization.

13113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2899.

The product of its digits is 36, while the sum is 14.

The square root of 13113221 is about 3621.2181652035. The cubic root of 13113221 is about 235.8141131754.

Adding to 13113221 its reverse (12231131), we get a palindrome (25344352).

The spelling of 13113221 in words is "thirteen million, one hundred thirteen thousand, two hundred twenty-one".