2004512221 has 2 divisors, whose sum is σ = 2004512222. Its totient is φ = 2004512220.

The previous prime is 2004512171. The next prime is 2004512227. The reversal of 2004512221 is 1222154002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1101509721 + 903002500 = 33189^2 + 30050^2 .

It is a cyclic number.

It is not a de Polignac number, because 2004512221 - 2¹¹ = 2004510173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2004512227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002256110 + 1002256111.

It is an arithmetic number, because the mean of its divisors is an integer number (1002256111).

Almost surely, 2^2004512221 is an apocalyptic number.

It is an amenable number.

2004512221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2004512221 is an equidigital number, since it uses as much as digits as its factorization.

2004512221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 2004512221 is about 44771.7792923176. The cubic root of 2004512221 is about 1260.8678452631.

Adding to 2004512221 its reverse (1222154002), we get a palindrome (3226666223).

The spelling of 2004512221 in words is "two billion, four million, five hundred twelve thousand, two hundred twenty-one".