12206213 has 4 divisors (see below), whose sum is σ = 12214860. Its totient is φ = 12197568.

The previous prime is 12206209. The next prime is 12206269. The reversal of 12206213 is 31260221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2365444 + 9840769 = 1538^2 + 3137^2 .

It is a cyclic number.

It is not a de Polignac number, because 12206213 - 2² = 12206209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12206191 and 12206200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12206203) 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, 1658 + ... + 5211.

It is an arithmetic number, because the mean of its divisors is an integer number (3053715).

Almost surely, 2^12206213 is an apocalyptic number.

It is an amenable number.

12206213 is a deficient number, since it is larger than the sum of its proper divisors (8647).

12206213 is an equidigital number, since it uses as much as digits as its factorization.

12206213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8646.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 12206213 is about 3493.7391144732. The cubic root of 12206213 is about 230.2468238738.

Adding to 12206213 its reverse (31260221), we get a palindrome (43466434).

The spelling of 12206213 in words is "twelve million, two hundred six thousand, two hundred thirteen".