212223321 has 24 divisors (see below), whose sum is σ = 321082944. Its totient is φ = 140065200.

The previous prime is 212223313. The next prime is 212223343. The reversal of 212223321 is 123322212.

It is not a de Polignac number, because 212223321 - 2³ = 212223313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212223294 and 212223303.

It is not an unprimeable number, because it can be changed into a prime (212223311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20220 + ... + 28866.

It is an arithmetic number, because the mean of its divisors is an integer number (13378456).

Almost surely, 2^212223321 is an apocalyptic number.

It is an amenable number.

212223321 is a deficient number, since it is larger than the sum of its proper divisors (108859623).

212223321 is an equidigital number, since it uses as much as digits as its factorization.

212223321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8763 (or 8751 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 212223321 is about 14567.8866346495. The cubic root of 212223321 is about 596.4824938823.

Adding to 212223321 its reverse (123322212), we get a palindrome (335545533).

The spelling of 212223321 in words is "two hundred twelve million, two hundred twenty-three thousand, three hundred twenty-one".