3301212221 has 2 divisors, whose sum is σ = 3301212222. Its totient is φ = 3301212220.

The previous prime is 3301212217. The next prime is 3301212307. The reversal of 3301212221 is 1222121033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2448864196 + 852348025 = 49486^2 + 29195^2 .

It is a cyclic number.

It is not a de Polignac number, because 3301212221 - 2² = 3301212217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3301212221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3301212721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1650606110 + 1650606111.

It is an arithmetic number, because the mean of its divisors is an integer number (1650606111).

Almost surely, 2^3301212221 is an apocalyptic number.

It is an amenable number.

3301212221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3301212221 is an equidigital number, since it uses as much as digits as its factorization.

3301212221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 3301212221 is about 57456.1765261142. The cubic root of 3301212221 is about 1488.9878297634.

Adding to 3301212221 its reverse (1222121033), we get a palindrome (4523333254).

The spelling of 3301212221 in words is "three billion, three hundred one million, two hundred twelve thousand, two hundred twenty-one".