200021208912989 has 2 divisors, whose sum is σ = 200021208912990. Its totient is φ = 200021208912988.

The previous prime is 200021208912977. The next prime is 200021208912991. The reversal of 200021208912989 is 989219802120002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146861871720964 + 53159337192025 = 12118658^2 + 7291045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200021208912989 is a prime.

Together with 200021208912991, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200021208912989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200021208912919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010604456494 + 100010604456495.

It is an arithmetic number, because the mean of its divisors is an integer number (100010604456495).

Almost surely, 2^{200021208912989} is an apocalyptic number.

It is an amenable number.

200021208912989 is a deficient number, since it is larger than the sum of its proper divisors (1).

200021208912989 is an equidigital number, since it uses as much as digits as its factorization.

200021208912989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 53.

The spelling of 200021208912989 in words is "two hundred trillion, twenty-one billion, two hundred eight million, nine hundred twelve thousand, nine hundred eighty-nine".