2000000221 has 4 divisors (see below), whose sum is σ = 2017699452. Its totient is φ = 1982300992.

The previous prime is 2000000203. The next prime is 2000000227. The reversal of 2000000221 is 1220000002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 209525625 + 1790474596 = 14475^2 + 42314^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000000221 - 2²¹ = 1997903069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000000227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8849446 + ... + 8849671.

It is an arithmetic number, because the mean of its divisors is an integer number (504424863).

Almost surely, 2^2000000221 is an apocalyptic number.

It is an amenable number.

2000000221 is a deficient number, since it is larger than the sum of its proper divisors (17699231).

2000000221 is a wasteful number, since it uses less digits than its factorization.

2000000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17699230.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 2000000221 is about 44721.3620208508. The cubic root of 2000000221 is about 1259.9210963020.

Adding to 2000000221 its reverse (1220000002), we get a palindrome (3220000223).

The spelling of 2000000221 in words is "two billion, two hundred twenty-one", and thus it is an aban number.