199210980109 has 2 divisors, whose sum is σ = 199210980110. Its totient is φ = 199210980108.

The previous prime is 199210980107. The next prime is 199210980161. The reversal of 199210980109 is 901089012991.

199210980109 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 can be written as a sum of positive squares in only one way, i.e., 199170301225 + 40678884 = 446285^2 + 6378^2 .

It is a cyclic number.

It is not a de Polignac number, because 199210980109 - 2¹ = 199210980107 is a prime.

Together with 199210980107, 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 (199210980107) 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, 99605490054 + 99605490055.

It is an arithmetic number, because the mean of its divisors is an integer number (99605490055).

Almost surely, 2^199210980109 is an apocalyptic number.

It is an amenable number.

199210980109 is a deficient number, since it is larger than the sum of its proper divisors (1).

199210980109 is an equidigital number, since it uses as much as digits as its factorization.

199210980109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 49.

The spelling of 199210980109 in words is "one hundred ninety-nine billion, two hundred ten million, nine hundred eighty thousand, one hundred nine".