2320212221 has 2 divisors, whose sum is σ = 2320212222. Its totient is φ = 2320212220.

The previous prime is 2320212203. The next prime is 2320212233. The reversal of 2320212221 is 1222120232.

2320212221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1752343321 + 567868900 = 41861^2 + 23830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2320212221 is a prime.

It is a Sophie Germain prime.

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 2320212221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2320212821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160106110 + 1160106111.

It is an arithmetic number, because the mean of its divisors is an integer number (1160106111).

Almost surely, 2^2320212221 is an apocalyptic number.

It is an amenable number.

2320212221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2320212221 is an equidigital number, since it uses as much as digits as its factorization.

2320212221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2320212221 is about 48168.5812641394. The cubic root of 2320212221 is about 1323.8615536987.

Adding to 2320212221 its reverse (1222120232), we get a palindrome (3542332453).

The spelling of 2320212221 in words is "two billion, three hundred twenty million, two hundred twelve thousand, two hundred twenty-one".