21302322020009 has 2 divisors, whose sum is σ = 21302322020010. Its totient is φ = 21302322020008.

The previous prime is 21302322019987. The next prime is 21302322020039. The reversal of 21302322020009 is 90002022320312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11251697466025 + 10050624553984 = 3354355^2 + 3170272^2 .

It is a cyclic number.

It is not a de Polignac number, because 21302322020009 - 2¹² = 21302322015913 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21302322020009.

It is not a weakly prime, because it can be changed into another prime (21302322020039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651161010004 + 10651161010005.

It is an arithmetic number, because the mean of its divisors is an integer number (10651161010005).

Almost surely, 2^{21302322020009} is an apocalyptic number.

It is an amenable number.

21302322020009 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302322020009 is an equidigital number, since it uses as much as digits as its factorization.

21302322020009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The spelling of 21302322020009 in words is "twenty-one trillion, three hundred two billion, three hundred twenty-two million, twenty thousand, nine".