200021000009797 has 2 divisors, whose sum is σ = 200021000009798. Its totient is φ = 200021000009796.

The previous prime is 200021000009773. The next prime is 200021000009893. The reversal of 200021000009797 is 797900000120002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142448855817636 + 57572144192161 = 11935194^2 + 7587631^2 .

It is a cyclic number.

It is not a de Polignac number, because 200021000009797 - 2¹¹ = 200021000007749 is a prime.

It is a super-2 number, since 2×200021000009797² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200021000009707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010500004898 + 100010500004899.

It is an arithmetic number, because the mean of its divisors is an integer number (100010500004899).

Almost surely, 2^{200021000009797} is an apocalyptic number.

It is an amenable number.

200021000009797 is a deficient number, since it is larger than the sum of its proper divisors (1).

200021000009797 is an equidigital number, since it uses as much as digits as its factorization.

200021000009797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 37.

Adding to 200021000009797 its reverse (797900000120002), we get a palindrome (997921000129799).

The spelling of 200021000009797 in words is "two hundred trillion, twenty-one billion, nine thousand, seven hundred ninety-seven".