212303321 has 4 divisors (see below), whose sum is σ = 223477200. Its totient is φ = 201129444.

The previous prime is 212303303. The next prime is 212303387. The reversal of 212303321 is 123303212.

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 212303321 - 2¹⁴ = 212286937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212303321.

It is not an unprimeable number, because it can be changed into a prime (212303821) 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, 5586911 + ... + 5586948.

It is an arithmetic number, because the mean of its divisors is an integer number (55869300).

Almost surely, 2^212303321 is an apocalyptic number.

It is an amenable number.

212303321 is a deficient number, since it is larger than the sum of its proper divisors (11173879).

212303321 is a wasteful number, since it uses less digits than its factorization.

212303321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11173878.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 212303321 is about 14570.6321414000. The cubic root of 212303321 is about 596.5574347583.

Adding to 212303321 its reverse (123303212), we get a palindrome (335606533).

The spelling of 212303321 in words is "two hundred twelve million, three hundred three thousand, three hundred twenty-one".