13221003 has 8 divisors (see below), whose sum is σ = 17810128. Its totient is φ = 8722944.

The previous prime is 13220993. The next prime is 13221007. The reversal of 13221003 is 30012231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13221003 - 2⁵ = 13220971 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 13221003.

It is not an unprimeable number, because it can be changed into a prime (13221007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22426 + ... + 23007.

It is an arithmetic number, because the mean of its divisors is an integer number (2226266).

Almost surely, 2^13221003 is an apocalyptic number.

13221003 is a deficient number, since it is larger than the sum of its proper divisors (4589125).

13221003 is an equidigital number, since it uses as much as digits as its factorization.

13221003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45533.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 13221003 is about 3636.0697188035. The cubic root of 13221003 is about 236.4584297610.

Adding to 13221003 its reverse (30012231), we get a palindrome (43233234).

The spelling of 13221003 in words is "thirteen million, two hundred twenty-one thousand, three".