21043301 has 2 divisors, whose sum is σ = 21043302. Its totient is φ = 21043300.

The previous prime is 21043289. The next prime is 21043313. The reversal of 21043301 is 10334012.

It is a balanced prime because it is at equal distance from previous prime (21043289) and next prime (21043313).

It can be written as a sum of positive squares in only one way, i.e., 15288100 + 5755201 = 3910^2 + 2399^2 .

It is a cyclic number.

It is not a de Polignac number, because 21043301 - 2⁶ = 21043237 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21043381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10521650 + 10521651.

It is an arithmetic number, because the mean of its divisors is an integer number (10521651).

Almost surely, 2^21043301 is an apocalyptic number.

It is an amenable number.

21043301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21043301 is an equidigital number, since it uses as much as digits as its factorization.

21043301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21043301 is about 4587.2977884589. The cubic root of 21043301 is about 276.0819131300.

Adding to 21043301 its reverse (10334012), we get a palindrome (31377313).

The spelling of 21043301 in words is "twenty-one million, forty-three thousand, three hundred one".