212302321 has 16 divisors (see below), whose sum is σ = 266168448. Its totient is φ = 164505600.

The previous prime is 212302289. The next prime is 212302327. The reversal of 212302321 is 123203212.

It is not a de Polignac number, because 212302321 - 2⁵ = 212302289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212302295 and 212302304.

It is not an unprimeable number, because it can be changed into a prime (212302327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6321 + ... + 21553.

It is an arithmetic number, because the mean of its divisors is an integer number (16635528).

Almost surely, 2^212302321 is an apocalyptic number.

It is an amenable number.

212302321 is a deficient number, since it is larger than the sum of its proper divisors (53866127).

212302321 is a wasteful number, since it uses less digits than its factorization.

212302321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15432.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 212302321 is about 14570.5978257586. The cubic root of 212302321 is about 596.5564981135.

Adding to 212302321 its reverse (123203212), we get a palindrome (335505533).

The spelling of 212302321 in words is "two hundred twelve million, three hundred two thousand, three hundred twenty-one".