199990111111 has 24 divisors (see below), whose sum is σ = 247837728240. Its totient is φ = 160346656512.

The previous prime is 199990111103. The next prime is 199990111127. The reversal of 199990111111 is 111111099991.

It is a happy number.

It is not a de Polignac number, because 199990111111 - 2³ = 199990111103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199990111411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 600676 + ... + 872233.

It is an arithmetic number, because the mean of its divisors is an integer number (10326572010).

Almost surely, 2^199990111111 is an apocalyptic number.

199990111111 is a deficient number, since it is larger than the sum of its proper divisors (47847617129).

199990111111 is a wasteful number, since it uses less digits than its factorization.

199990111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473103 (or 1473096 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 43.

The spelling of 199990111111 in words is "one hundred ninety-nine billion, nine hundred ninety million, one hundred eleven thousand, one hundred eleven".