13221163 has 4 divisors (see below), whose sum is σ = 13231368. Its totient is φ = 13210960.

The previous prime is 13221151. The next prime is 13221191. The reversal of 13221163 is 36112231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 36112231 = 23 ⋅1570097.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13221163 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 13221163.

It is not an unprimeable number, because it can be changed into a prime (13221863) 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, 2818 + ... + 5863.

It is an arithmetic number, because the mean of its divisors is an integer number (3307842).

Almost surely, 2^13221163 is an apocalyptic number.

13221163 is a deficient number, since it is larger than the sum of its proper divisors (10205).

13221163 is an equidigital number, since it uses as much as digits as its factorization.

13221163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10204.

The product of its digits is 216, while the sum is 19.

The square root of 13221163 is about 3636.0917205153. The cubic root of 13221163 is about 236.4593836270.

Adding to 13221163 its reverse (36112231), we get a palindrome (49333394).

It can be divided in two parts, 1322 and 1163, that added together give a triangular number (2485 = T₇₀).

The spelling of 13221163 in words is "thirteen million, two hundred twenty-one thousand, one hundred sixty-three".