13221171 has 8 divisors (see below), whose sum is σ = 19586960. Its totient is φ = 8814096.

The previous prime is 13221151. The next prime is 13221191. The reversal of 13221171 is 17112231.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13221151) and next prime (13221191).

It is not a de Polignac number, because 13221171 - 2⁵ = 13221139 is a prime.

It is a super-2 number, since 2×13221171² = 349598725222482, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 244810 + ... + 244863.

It is an arithmetic number, because the mean of its divisors is an integer number (2448370).

Almost surely, 2^13221171 is an apocalyptic number.

13221171 is a deficient number, since it is larger than the sum of its proper divisors (6365789).

13221171 is an equidigital number, since it uses as much as digits as its factorization.

13221171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489682 (or 489676 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 13221171 is about 3636.0928205974. The cubic root of 13221171 is about 236.4594313201.

The spelling of 13221171 in words is "thirteen million, two hundred twenty-one thousand, one hundred seventy-one".