12220213 has 4 divisors (see below), whose sum is σ = 12504448. Its totient is φ = 11935980.

The previous prime is 12220193. The next prime is 12220217. The reversal of 12220213 is 31202221.

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 not a de Polignac number, because 12220213 - 2¹³ = 12212021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12220193 and 12220202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220217) 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, 142053 + ... + 142138.

It is an arithmetic number, because the mean of its divisors is an integer number (3126112).

Almost surely, 2^12220213 is an apocalyptic number.

It is an amenable number.

12220213 is a deficient number, since it is larger than the sum of its proper divisors (284235).

12220213 is an equidigital number, since it uses as much as digits as its factorization.

12220213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284234.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 12220213 is about 3495.7421243564. The cubic root of 12220213 is about 230.3348179669.

Adding to 12220213 its reverse (31202221), we get a palindrome (43422434).

The spelling of 12220213 in words is "twelve million, two hundred twenty thousand, two hundred thirteen".