13221151 has 2 divisors, whose sum is σ = 13221152. Its totient is φ = 13221150.

The previous prime is 13221149. The next prime is 13221191. The reversal of 13221151 is 15112231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13221151 - 2¹ = 13221149 is a prime.

Together with 13221149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13221101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610575 + 6610576.

It is an arithmetic number, because the mean of its divisors is an integer number (6610576).

Almost surely, 2^13221151 is an apocalyptic number.

13221151 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221151 is an equidigital number, since it uses as much as digits as its factorization.

13221151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60, while the sum is 16.

The square root of 13221151 is about 3636.0900703915. The cubic root of 13221151 is about 236.4593120873.

Adding to 13221151 its reverse (15112231), we get a palindrome (28333382).

The spelling of 13221151 in words is "thirteen million, two hundred twenty-one thousand, one hundred fifty-one".