21200041 has 2 divisors, whose sum is σ = 21200042. Its totient is φ = 21200040.

The previous prime is 21200021. The next prime is 21200051. The reversal of 21200041 is 14000212.

It is an a-pointer prime, because the next prime (21200051) can be obtained adding 21200041 to its sum of digits (10).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14288400 + 6911641 = 3780^2 + 2629^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21200041 is a prime.

It is not a weakly prime, because it can be changed into another prime (21200021) 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, 10600020 + 10600021.

It is an arithmetic number, because the mean of its divisors is an integer number (10600021).

Almost surely, 2^21200041 is an apocalyptic number.

It is an amenable number.

21200041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200041 is an equidigital number, since it uses as much as digits as its factorization.

21200041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 21200041 is about 4604.3502256019. The cubic root of 21200041 is about 276.7656791468.

Adding to 21200041 its reverse (14000212), we get a palindrome (35200253).

The spelling of 21200041 in words is "twenty-one million, two hundred thousand, forty-one".