200020202209981 has 2 divisors, whose sum is σ = 200020202209982. Its totient is φ = 200020202209980.

The previous prime is 200020202209979. The next prime is 200020202210009. The reversal of 200020202209981 is 189902202020002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199990224404100 + 29977805881 = 14141790^2 + 173141^2 .

It is a cyclic number.

It is not a de Polignac number, because 200020202209981 - 2¹ = 200020202209979 is a prime.

It is a super-2 number, since 2×200020202209981² (a number of 29 digits) contains 22 as substring.

Together with 200020202209979, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 200020202209981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200020202200981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010101104990 + 100010101104991.

It is an arithmetic number, because the mean of its divisors is an integer number (100010101104991).

Almost surely, 2^{200020202209981} is an apocalyptic number.

It is an amenable number.

200020202209981 is a deficient number, since it is larger than the sum of its proper divisors (1).

200020202209981 is an equidigital number, since it uses as much as digits as its factorization.

200020202209981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 37.

Adding to 200020202209981 its reverse (189902202020002), we get a palindrome (389922404229983).

The spelling of 200020202209981 in words is "two hundred trillion, twenty billion, two hundred two million, two hundred nine thousand, nine hundred eighty-one".