2220322221 has 12 divisors (see below), whose sum is σ = 3453834748. Its totient is φ = 1366352064.

The previous prime is 2220322201. The next prime is 2220322231. The reversal of 2220322221 is 1222230222.

It can be written as a sum of positive squares in 2 ways, for example, as 218744100 + 2001578121 = 14790^2 + 44739^2 .

It is not a de Polignac number, because 2220322221 - 2⁹ = 2220321709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2220322194 and 2220322203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220322201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9488440 + ... + 9488673.

Almost surely, 2^2220322221 is an apocalyptic number.

It is an amenable number.

2220322221 is a deficient number, since it is larger than the sum of its proper divisors (1233512527).

2220322221 is a wasteful number, since it uses less digits than its factorization.

2220322221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18977132 (or 18977129 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 2220322221 is about 47120.2952134216. The cubic root of 2220322221 is about 1304.5838616789.

Adding to 2220322221 its reverse (1222230222), we get a palindrome (3442552443).

The spelling of 2220322221 in words is "two billion, two hundred twenty million, three hundred twenty-two thousand, two hundred twenty-one".