212321200321 has 2 divisors, whose sum is σ = 212321200322. Its totient is φ = 212321200320.

The previous prime is 212321200291. The next prime is 212321200393. The reversal of 212321200321 is 123002123212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152767631025 + 59553569296 = 390855^2 + 244036^2 .

It is a cyclic number.

It is not a de Polignac number, because 212321200321 - 2¹¹ = 212321198273 is a prime.

It is not a weakly prime, because it can be changed into another prime (212321240321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106160600160 + 106160600161.

It is an arithmetic number, because the mean of its divisors is an integer number (106160600161).

Almost surely, 2^212321200321 is an apocalyptic number.

It is an amenable number.

212321200321 is a deficient number, since it is larger than the sum of its proper divisors (1).

212321200321 is an equidigital number, since it uses as much as digits as its factorization.

212321200321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 212321200321 its reverse (123002123212), we get a palindrome (335323323533).

The spelling of 212321200321 in words is "two hundred twelve billion, three hundred twenty-one million, two hundred thousand, three hundred twenty-one".