212305321 has 2 divisors, whose sum is σ = 212305322. Its totient is φ = 212305320.

The previous prime is 212305307. The next prime is 212305337. The reversal of 212305321 is 123503212.

212305321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211295296 + 1010025 = 14536^2 + 1005^2 .

It is a cyclic number.

It is not a de Polignac number, because 212305321 - 2²⁵ = 178750889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212300321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106152660 + 106152661.

It is an arithmetic number, because the mean of its divisors is an integer number (106152661).

Almost surely, 2^212305321 is an apocalyptic number.

It is an amenable number.

212305321 is a deficient number, since it is larger than the sum of its proper divisors (1).

212305321 is an equidigital number, since it uses as much as digits as its factorization.

212305321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 212305321 is about 14570.7007724406. The cubic root of 212305321 is about 596.5593080389.

Adding to 212305321 its reverse (123503212), we get a palindrome (335808533).

The spelling of 212305321 in words is "two hundred twelve million, three hundred five thousand, three hundred twenty-one".