199118109012 has 24 divisors (see below), whose sum is σ = 466074573216. Its totient is φ = 66163324128.

The previous prime is 199118109011. The next prime is 199118109019. The reversal of 199118109012 is 210901811991.

It is a super-2 number, since 2×199118109012² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199118109011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26168398 + ... + 26176005.

It is an arithmetic number, because the mean of its divisors is an integer number (19419773884).

Almost surely, 2^199118109012 is an apocalyptic number.

199118109012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

199118109012 is an abundant number, since it is smaller than the sum of its proper divisors (266956464204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199118109012 is a wasteful number, since it uses less digits than its factorization.

199118109012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52344727 (or 52344725 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 42.

The spelling of 199118109012 in words is "one hundred ninety-nine billion, one hundred eighteen million, one hundred nine thousand, twelve".