111987119818 has 16 divisors (see below), whose sum is σ = 197166513024. Its totient is φ = 46697331600.

The previous prime is 111987119801. The next prime is 111987119831. The reversal of 111987119818 is 818911789111.

It is a happy number.

It is a super-3 number, since 3×111987119818³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108095158 + ... + 108096193.

It is an arithmetic number, because the mean of its divisors is an integer number (12322907064).

Almost surely, 2^111987119818 is an apocalyptic number.

111987119818 is a deficient number, since it is larger than the sum of its proper divisors (85179393206).

111987119818 is a wasteful number, since it uses less digits than its factorization.

111987119818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216191397.

The product of its digits is 290304, while the sum is 55.

The spelling of 111987119818 in words is "one hundred eleven billion, nine hundred eighty-seven million, one hundred nineteen thousand, eight hundred eighteen".