21303001010017 has 2 divisors, whose sum is σ = 21303001010018. Its totient is φ = 21303001010016.

The previous prime is 21303001009957. The next prime is 21303001010021. The reversal of 21303001010017 is 71001010030312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21147820952976 + 155180057041 = 4598676^2 + 393929^2 .

It is a cyclic number.

It is not a de Polignac number, because 21303001010017 - 2³⁹ = 20753245196129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21303001009976 and 21303001010003.

It is not a weakly prime, because it can be changed into another prime (21303001010047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651500505008 + 10651500505009.

It is an arithmetic number, because the mean of its divisors is an integer number (10651500505009).

Almost surely, 2^{21303001010017} is an apocalyptic number.

It is an amenable number.

21303001010017 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303001010017 is an equidigital number, since it uses as much as digits as its factorization.

21303001010017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 19.

Adding to 21303001010017 its reverse (71001010030312), we get a palindrome (92304011040329).

The spelling of 21303001010017 in words is "twenty-one trillion, three hundred three billion, one million, ten thousand, seventeen".