2320222721 has 2 divisors, whose sum is σ = 2320222722. Its totient is φ = 2320222720.

The previous prime is 2320222717. The next prime is 2320222739. The reversal of 2320222721 is 1272220232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2196234496 + 123988225 = 46864^2 + 11135^2 .

It is a cyclic number.

It is not a de Polignac number, because 2320222721 - 2² = 2320222717 is a prime.

It is not a weakly prime, because it can be changed into another prime (2320222771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160111360 + 1160111361.

It is an arithmetic number, because the mean of its divisors is an integer number (1160111361).

Almost surely, 2^2320222721 is an apocalyptic number.

It is an amenable number.

2320222721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2320222721 is an equidigital number, since it uses as much as digits as its factorization.

2320222721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 2320222721 is about 48168.6902562235. The cubic root of 2320222721 is about 1323.8635507180.

Adding to 2320222721 its reverse (1272220232), we get a palindrome (3592442953).

The spelling of 2320222721 in words is "two billion, three hundred twenty million, two hundred twenty-two thousand, seven hundred twenty-one".