199867441211 has 2 divisors, whose sum is σ = 199867441212. Its totient is φ = 199867441210.

The previous prime is 199867441187. The next prime is 199867441217. The reversal of 199867441211 is 112144768991.

It is a strong prime.

It is an emirp because it is prime and its reverse (112144768991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199867441211 is a prime.

It is a super-2 number, since 2×199867441211² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (199867441217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99933720605 + 99933720606.

It is an arithmetic number, because the mean of its divisors is an integer number (99933720606).

Almost surely, 2^199867441211 is an apocalyptic number.

199867441211 is a deficient number, since it is larger than the sum of its proper divisors (1).

199867441211 is an equidigital number, since it uses as much as digits as its factorization.

199867441211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 53.

The spelling of 199867441211 in words is "one hundred ninety-nine billion, eight hundred sixty-seven million, four hundred forty-one thousand, two hundred eleven".