2104352221 has 2 divisors, whose sum is σ = 2104352222. Its totient is φ = 2104352220.

The previous prime is 2104352209. The next prime is 2104352269. The reversal of 2104352221 is 1222534012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1719760900 + 384591321 = 41470^2 + 19611^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104352221 - 2¹⁷ = 2104221149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2104352192 and 2104352201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2104352321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052176110 + 1052176111.

It is an arithmetic number, because the mean of its divisors is an integer number (1052176111).

Almost surely, 2^2104352221 is an apocalyptic number.

It is an amenable number.

2104352221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2104352221 is an equidigital number, since it uses as much as digits as its factorization.

2104352221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2104352221 is about 45873.2189954008. The cubic root of 2104352221 is about 1281.4632154195.

Adding to 2104352221 its reverse (1222534012), we get a palindrome (3326886233).

The spelling of 2104352221 in words is "two billion, one hundred four million, three hundred fifty-two thousand, two hundred twenty-one".