13211213 has 4 divisors (see below), whose sum is σ = 13906560. Its totient is φ = 12515868.

The previous prime is 13211207. The next prime is 13211243. The reversal of 13211213 is 31211231.

13211213 is digitally balanced in base 2, 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13211213 is a prime.

It is a super-2 number, since 2×13211213² = 349072297862738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13211243) 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, 347645 + ... + 347682.

It is an arithmetic number, because the mean of its divisors is an integer number (3476640).

Almost surely, 2^13211213 is an apocalyptic number.

It is an amenable number.

13211213 is a deficient number, since it is larger than the sum of its proper divisors (695347).

13211213 is an equidigital number, since it uses as much as digits as its factorization.

13211213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695346.

The product of its digits is 36, while the sum is 14.

The square root of 13211213 is about 3634.7232356811. The cubic root of 13211213 is about 236.4000504369.

Adding to 13211213 its reverse (31211231), we get a palindrome (44422444).

The spelling of 13211213 in words is "thirteen million, two hundred eleven thousand, two hundred thirteen".