200010001991 has 2 divisors, whose sum is σ = 200010001992. Its totient is φ = 200010001990.

The previous prime is 200010001981. The next prime is 200010002039. The reversal of 200010001991 is 199100010002.

200010001991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200010001991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200010001901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100005000995 + 100005000996.

It is an arithmetic number, because the mean of its divisors is an integer number (100005000996).

Almost surely, 2^200010001991 is an apocalyptic number.

200010001991 is a deficient number, since it is larger than the sum of its proper divisors (1).

200010001991 is an equidigital number, since it uses as much as digits as its factorization.

200010001991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 23.

Adding to 200010001991 its reverse (199100010002), we get a palindrome (399110011993).

The spelling of 200010001991 in words is "two hundred billion, ten million, one thousand, nine hundred ninety-one".