212223323209 has 4 divisors (see below), whose sum is σ = 212792286916. Its totient is φ = 211654359504.

The previous prime is 212223323177. The next prime is 212223323219. The reversal of 212223323209 is 902323322212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 171952867584 + 40270455625 = 414672^2 + 200675^2 .

It is a cyclic number.

It is not a de Polignac number, because 212223323209 - 2⁵ = 212223323177 is a prime.

It is a super-3 number, since 3×212223323209³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212223323219) 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, 284481294 + ... + 284482039.

It is an arithmetic number, because the mean of its divisors is an integer number (53198071729).

Almost surely, 2^212223323209 is an apocalyptic number.

It is an amenable number.

212223323209 is a deficient number, since it is larger than the sum of its proper divisors (568963707).

212223323209 is an equidigital number, since it uses as much as digits as its factorization.

212223323209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568963706.

The product of its (nonzero) digits is 15552, while the sum is 31.

The spelling of 212223323209 in words is "two hundred twelve billion, two hundred twenty-three million, three hundred twenty-three thousand, two hundred nine".