21104224363 has 2 divisors, whose sum is σ = 21104224364. Its totient is φ = 21104224362.

The previous prime is 21104224343. The next prime is 21104224441. The reversal of 21104224363 is 36342240112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21104224363 - 2²⁵ = 21070669931 is a prime.

It is not a weakly prime, because it can be changed into another prime (21104224313) 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, 10552112181 + 10552112182.

It is an arithmetic number, because the mean of its divisors is an integer number (10552112182).

Almost surely, 2^21104224363 is an apocalyptic number.

21104224363 is a deficient number, since it is larger than the sum of its proper divisors (1).

21104224363 is an equidigital number, since it uses as much as digits as its factorization.

21104224363 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 21104224363 its reverse (36342240112), we get a palindrome (57446464475).

The spelling of 21104224363 in words is "twenty-one billion, one hundred four million, two hundred twenty-four thousand, three hundred sixty-three".