200120191 has 2 divisors, whose sum is σ = 200120192. Its totient is φ = 200120190.

The previous prime is 200120189. The next prime is 200120201. The reversal of 200120191 is 191021002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 200120191 - 2¹ = 200120189 is a prime.

Together with 200120189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200120131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060095 + 100060096.

It is an arithmetic number, because the mean of its divisors is an integer number (100060096).

Almost surely, 2^200120191 is an apocalyptic number.

200120191 is a deficient number, since it is larger than the sum of its proper divisors (1).

200120191 is an equidigital number, since it uses as much as digits as its factorization.

200120191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 200120191 is about 14146.3843790560. The cubic root of 200120191 is about 584.9206710557.

Adding to 200120191 its reverse (191021002), we get a palindrome (391141193).

The spelling of 200120191 in words is "two hundred million, one hundred twenty thousand, one hundred ninety-one".