3000006221 has 2 divisors, whose sum is σ = 3000006222. Its totient is φ = 3000006220.

The previous prime is 3000006209. The next prime is 3000006259. The reversal of 3000006221 is 1226000003.

3000006221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2996358121 + 3648100 = 54739^2 + 1910^2 .

It is an emirp because it is prime and its reverse (1226000003) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3000006221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3000006196 and 3000006205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3000006421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1500003110 + 1500003111.

It is an arithmetic number, because the mean of its divisors is an integer number (1500003111).

Almost surely, 2^3000006221 is an apocalyptic number.

It is an amenable number.

3000006221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3000006221 is an equidigital number, since it uses as much as digits as its factorization.

3000006221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 3000006221 is about 54772.3125401877. The cubic root of 3000006221 is about 1442.2505672217.

Adding to 3000006221 its reverse (1226000003), we get a palindrome (4226006224).

The spelling of 3000006221 in words is "three billion, six thousand, two hundred twenty-one".