2321322221 has 2 divisors, whose sum is σ = 2321322222. Its totient is φ = 2321322220.

The previous prime is 2321322193. The next prime is 2321322247. The reversal of 2321322221 is 1222231232.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2071524196 + 249798025 = 45514^2 + 15805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2321322221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2321322193 and 2321322202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2321322271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160661110 + 1160661111.

It is an arithmetic number, because the mean of its divisors is an integer number (1160661111).

Almost surely, 2^2321322221 is an apocalyptic number.

It is an amenable number.

2321322221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321322221 is an equidigital number, since it uses as much as digits as its factorization.

2321322221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 20.

The square root of 2321322221 is about 48180.1019197760. The cubic root of 2321322221 is about 1324.0726338228.

Adding to 2321322221 its reverse (1222231232), we get a palindrome (3543553453).

The spelling of 2321322221 in words is "two billion, three hundred twenty-one million, three hundred twenty-two thousand, two hundred twenty-one".