199210009919 has 2 divisors, whose sum is σ = 199210009920. Its totient is φ = 199210009918.

The previous prime is 199210009853. The next prime is 199210009967. The reversal of 199210009919 is 919900012991.

It is a strong prime.

It is an emirp because it is prime and its reverse (919900012991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199210009919 - 2³⁶ = 130490533183 is a prime.

It is a super-2 number, since 2×199210009919² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199210009519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99605004959 + 99605004960.

It is an arithmetic number, because the mean of its divisors is an integer number (99605004960).

Almost surely, 2^199210009919 is an apocalyptic number.

199210009919 is a deficient number, since it is larger than the sum of its proper divisors (1).

199210009919 is an equidigital number, since it uses as much as digits as its factorization.

199210009919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118098, while the sum is 50.

The spelling of 199210009919 in words is "one hundred ninety-nine billion, two hundred ten million, nine thousand, nine hundred nineteen".