2104410221 has 2 divisors, whose sum is σ = 2104410222. Its totient is φ = 2104410220.

The previous prime is 2104410211. The next prime is 2104410223. The reversal of 2104410221 is 1220144012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1839208996 + 265201225 = 42886^2 + 16285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2104410221 is a prime.

It is a Sophie Germain prime.

Together with 2104410223, it forms a pair of twin primes.

It is a Chen 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 2104410221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2104410223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052205110 + 1052205111.

It is an arithmetic number, because the mean of its divisors is an integer number (1052205111).

Almost surely, 2^2104410221 is an apocalyptic number.

It is an amenable number.

2104410221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2104410221 is an equidigital number, since it uses as much as digits as its factorization.

2104410221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2104410221 is about 45873.8511681764. The cubic root of 2104410221 is about 1281.4749885094.

Adding to 2104410221 its reverse (1220144012), we get a palindrome (3324554233).

The spelling of 2104410221 in words is "two billion, one hundred four million, four hundred ten thousand, two hundred twenty-one".