21241163 has 2 divisors, whose sum is σ = 21241164. Its totient is φ = 21241162.

The previous prime is 21241153. The next prime is 21241217. The reversal of 21241163 is 36114212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21241163 - 2⁴ = 21241147 is a prime.

It is not a weakly prime, because it can be changed into another prime (21241123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10620581 + 10620582.

It is an arithmetic number, because the mean of its divisors is an integer number (10620582).

Almost surely, 2^21241163 is an apocalyptic number.

21241163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21241163 is an equidigital number, since it uses as much as digits as its factorization.

21241163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

The square root of 21241163 is about 4608.8136217469. The cubic root of 21241163 is about 276.9445122514.

Adding to 21241163 its reverse (36114212), we get a palindrome (57355375).

The spelling of 21241163 in words is "twenty-one million, two hundred forty-one thousand, one hundred sixty-three".