13221233 has 2 divisors, whose sum is σ = 13221234. Its totient is φ = 13221232.

The previous prime is 13221227. The next prime is 13221269. The reversal of 13221233 is 33212231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11404129 + 1817104 = 3377^2 + 1348^2 .

It is a cyclic number.

It is not a de Polignac number, because 13221233 - 2¹² = 13217137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13221293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610616 + 6610617.

It is an arithmetic number, because the mean of its divisors is an integer number (6610617).

Almost surely, 2^13221233 is an apocalyptic number.

It is an amenable number.

13221233 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221233 is an equidigital number, since it uses as much as digits as its factorization.

13221233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 17.

The square root of 13221233 is about 3636.1013462224. The cubic root of 13221233 is about 236.4598009409.

Adding to 13221233 its reverse (33212231), we get a palindrome (46433464).

The spelling of 13221233 in words is "thirteen million, two hundred twenty-one thousand, two hundred thirty-three".