13221107 has 4 divisors (see below), whose sum is σ = 13308816. Its totient is φ = 13133400.

The previous prime is 13221101. The next prime is 13221137. The reversal of 13221107 is 70112231.

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 13221107 - 2¹⁰ = 13220083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13221101) 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, 43628 + ... + 43929.

It is an arithmetic number, because the mean of its divisors is an integer number (3327204).

Almost surely, 2^13221107 is an apocalyptic number.

13221107 is a deficient number, since it is larger than the sum of its proper divisors (87709).

13221107 is an equidigital number, since it uses as much as digits as its factorization.

13221107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87708.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 13221107 is about 3636.0840199313. The cubic root of 13221107 is about 236.4590497748.

Adding to 13221107 its reverse (70112231), we get a palindrome (83333338).

The spelling of 13221107 in words is "thirteen million, two hundred twenty-one thousand, one hundred seven".