13221235 has 4 divisors (see below), whose sum is σ = 15865488. Its totient is φ = 10576984.

The previous prime is 13221233. The next prime is 13221269. The reversal of 13221235 is 53212231.

13221235 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13221235 - 2¹ = 13221233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13221233) 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, 1322119 + ... + 1322128.

It is an arithmetic number, because the mean of its divisors is an integer number (3966372).

Almost surely, 2^13221235 is an apocalyptic number.

13221235 is a deficient number, since it is larger than the sum of its proper divisors (2644253).

13221235 is an equidigital number, since it uses as much as digits as its factorization.

13221235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644252.

The product of its digits is 360, while the sum is 19.

The square root of 13221235 is about 3636.1016212422. The cubic root of 13221235 is about 236.4598128642.

Adding to 13221235 its reverse (53212231), we get a palindrome (66433466).

It can be divided in two parts, 13221 and 235, that added together give a square (13456 = 116²).

The spelling of 13221235 in words is "thirteen million, two hundred twenty-one thousand, two hundred thirty-five".