13321213 has 4 divisors (see below), whose sum is σ = 13372128. Its totient is φ = 13270300.

The previous prime is 13321211. The next prime is 13321219. The reversal of 13321213 is 31212331.

13321213 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31212331 = 1117 ⋅27943.

It is a cyclic number.

It is not a de Polignac number, because 13321213 - 2¹ = 13321211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13321211) 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, 25063 + ... + 25588.

It is an arithmetic number, because the mean of its divisors is an integer number (3343032).

Almost surely, 2^13321213 is an apocalyptic number.

It is an amenable number.

13321213 is a deficient number, since it is larger than the sum of its proper divisors (50915).

13321213 is an equidigital number, since it uses as much as digits as its factorization.

13321213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50914.

The product of its digits is 108, while the sum is 16.

The square root of 13321213 is about 3649.8236943721. The cubic root of 13321213 is about 237.0543472960.

Adding to 13321213 its reverse (31212331), we get a palindrome (44533544).

It can be divided in two parts, 133212 and 13, that added together give a square (133225 = 365²).

The spelling of 13321213 in words is "thirteen million, three hundred twenty-one thousand, two hundred thirteen".