212222213 has 4 divisors (see below), whose sum is σ = 242539680. Its totient is φ = 181904748.

The previous prime is 212222189. The next prime is 212222291. The reversal of 212222213 is 312222212.

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 212222213 - 2⁶ = 212222149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212222191 and 212222200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222113) 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, 15158723 + ... + 15158736.

It is an arithmetic number, because the mean of its divisors is an integer number (60634920).

Almost surely, 2^212222213 is an apocalyptic number.

It is an amenable number.

212222213 is a deficient number, since it is larger than the sum of its proper divisors (30317467).

212222213 is an equidigital number, since it uses as much as digits as its factorization.

212222213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30317466.

The product of its digits is 192, while the sum is 17.

The square root of 212222213 is about 14567.8486057482. The cubic root of 212222213 is about 596.4814558189.

Adding to 212222213 its reverse (312222212), we get a palindrome (524444425).

Subtracting 212222213 from its reverse (312222212), we obtain a palindrome (99999999).

The spelling of 212222213 in words is "two hundred twelve million, two hundred twenty-two thousand, two hundred thirteen".