199960119991 has 2 divisors, whose sum is σ = 199960119992. Its totient is φ = 199960119990.

The previous prime is 199960119973. The next prime is 199960120081. The reversal of 199960119991 is 199911069991.

It is a weak prime.

It is an emirp because it is prime and its reverse (199911069991) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 166611096661 and 166690116661.

It is a cyclic number.

It is not a de Polignac number, because 199960119991 - 2²¹ = 199958022839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199960119391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99980059995 + 99980059996.

It is an arithmetic number, because the mean of its divisors is an integer number (99980059996).

Almost surely, 2^199960119991 is an apocalyptic number.

199960119991 is a deficient number, since it is larger than the sum of its proper divisors (1).

199960119991 is an equidigital number, since it uses as much as digits as its factorization.

199960119991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3188646, while the sum is 64.

The spelling of 199960119991 in words is "one hundred ninety-nine billion, nine hundred sixty million, one hundred nineteen thousand, nine hundred ninety-one".