13221367 has 4 divisors (see below), whose sum is σ = 13235200. Its totient is φ = 13207536.

The previous prime is 13221353. The next prime is 13221379. The reversal of 13221367 is 76312231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13221367 - 2¹⁵ = 13188599 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 (13221317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5367 + ... + 7432.

It is an arithmetic number, because the mean of its divisors is an integer number (3308800).

Almost surely, 2^13221367 is an apocalyptic number.

13221367 is a deficient number, since it is larger than the sum of its proper divisors (13833).

13221367 is a wasteful number, since it uses less digits than its factorization.

13221367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13832.

The product of its digits is 1512, while the sum is 25.

The square root of 13221367 is about 3636.1197725048. The cubic root of 13221367 is about 236.4605997950.

Adding to 13221367 its reverse (76312231), we get a palindrome (89533598).

The spelling of 13221367 in words is "thirteen million, two hundred twenty-one thousand, three hundred sixty-seven".