21010411 has 2 divisors, whose sum is σ = 21010412. Its totient is φ = 21010410.

The previous prime is 21010403. The next prime is 21010427. The reversal of 21010411 is 11401012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21010411 - 2³ = 21010403 is a prime.

It is not a weakly prime, because it can be changed into another prime (21010441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505205 + 10505206.

It is an arithmetic number, because the mean of its divisors is an integer number (10505206).

Almost surely, 2^21010411 is an apocalyptic number.

21010411 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010411 is an equidigital number, since it uses as much as digits as its factorization.

21010411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 21010411 is about 4583.7114874302. The cubic root of 21010411 is about 275.9380024227.

Adding to 21010411 its reverse (11401012), we get a palindrome (32411423).

The spelling of 21010411 in words is "twenty-one million, ten thousand, four hundred eleven".