21004410041 has 2 divisors, whose sum is σ = 21004410042. Its totient is φ = 21004410040.

The previous prime is 21004410013. The next prime is 21004410043. The reversal of 21004410041 is 14001440012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20917547641 + 86862400 = 144629^2 + 9320^2 .

It is a cyclic number.

It is not a de Polignac number, because 21004410041 - 2⁶ = 21004409977 is a prime.

It is a Sophie Germain prime.

Together with 21004410043, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (21004410043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10502205020 + 10502205021.

It is an arithmetic number, because the mean of its divisors is an integer number (10502205021).

Almost surely, 2^21004410041 is an apocalyptic number.

It is an amenable number.

21004410041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21004410041 is an equidigital number, since it uses as much as digits as its factorization.

21004410041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21004410041 its reverse (14001440012), we get a palindrome (35005850053).

The spelling of 21004410041 in words is "twenty-one billion, four million, four hundred ten thousand, forty-one".