13221001 has 8 divisors (see below), whose sum is σ = 13434624. Its totient is φ = 13009200.

The previous prime is 13220993. The next prime is 13221007. The reversal of 13221001 is 10012231.

13221001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13221001 - 2³ = 13220993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13221007) 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, 22230 + ... + 22816.

It is an arithmetic number, because the mean of its divisors is an integer number (1679328).

Almost surely, 2^13221001 is an apocalyptic number.

It is an amenable number.

13221001 is a deficient number, since it is larger than the sum of its proper divisors (213623).

13221001 is a wasteful number, since it uses less digits than its factorization.

13221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 13221001 is about 3636.0694437813. The cubic root of 13221001 is about 236.4584178376.

Adding to 13221001 its reverse (10012231), we get a palindrome (23233232).

The spelling of 13221001 in words is "thirteen million, two hundred twenty-one thousand, one".