21241327 has 2 divisors, whose sum is σ = 21241328. Its totient is φ = 21241326.

The previous prime is 21241271. The next prime is 21241331. The reversal of 21241327 is 72314212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21241327 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21241298 and 21241307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21247327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10620663 + 10620664.

It is an arithmetic number, because the mean of its divisors is an integer number (10620664).

Almost surely, 2^21241327 is an apocalyptic number.

21241327 is a deficient number, since it is larger than the sum of its proper divisors (1).

21241327 is an equidigital number, since it uses as much as digits as its factorization.

21241327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 22.

The square root of 21241327 is about 4608.8314137100. The cubic root of 21241327 is about 276.9452249993.

Adding to 21241327 its reverse (72314212), we get a palindrome (93555539).

The spelling of 21241327 in words is "twenty-one million, two hundred forty-one thousand, three hundred twenty-seven".