21334241 has 2 divisors, whose sum is σ = 21334242. Its totient is φ = 21334240.

The previous prime is 21334219. The next prime is 21334253. The reversal of 21334241 is 14243312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12453841 + 8880400 = 3529^2 + 2980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21334241 is a prime.

It is not a weakly prime, because it can be changed into another prime (21337241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10667120 + 10667121.

It is an arithmetic number, because the mean of its divisors is an integer number (10667121).

Almost surely, 2^21334241 is an apocalyptic number.

It is an amenable number.

21334241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21334241 is an equidigital number, since it uses as much as digits as its factorization.

21334241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 20.

The square root of 21334241 is about 4618.9004102708. The cubic root of 21334241 is about 277.3484430652.

Adding to 21334241 its reverse (14243312), we get a palindrome (35577553).

The spelling of 21334241 in words is "twenty-one million, three hundred thirty-four thousand, two hundred forty-one".