21204341113 has 2 divisors, whose sum is σ = 21204341114. Its totient is φ = 21204341112.

The previous prime is 21204341057. The next prime is 21204341129. The reversal of 21204341113 is 31114340212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14310858384 + 6893482729 = 119628^2 + 83027^2 .

It is a cyclic number.

It is not a de Polignac number, because 21204341113 - 2²¹ = 21202243961 is a prime.

It is not a weakly prime, because it can be changed into another prime (21204371113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10602170556 + 10602170557.

It is an arithmetic number, because the mean of its divisors is an integer number (10602170557).

Almost surely, 2^21204341113 is an apocalyptic number.

It is an amenable number.

21204341113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21204341113 is an equidigital number, since it uses as much as digits as its factorization.

21204341113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21204341113 its reverse (31114340212), we get a palindrome (52318681325).

Subtracting 21204341113 from its reverse (31114340212), we obtain a palindrome (9909999099).

The spelling of 21204341113 in words is "twenty-one billion, two hundred four million, three hundred forty-one thousand, one hundred thirteen".