general_fact: 111 is the lowest positive integer requiring six syllables to name in American English, or seven syllables (including "and") in Canadian and British English.
math_fact: 111 is a perfect totient number.
trivia: 111 is the number occasionally referred to as "eleventy-one", as read in The Fellowship of the Ring by J.R.R.
historical_date: April 20th is the day in 1865 that Astronomer Pietro Angelo Secchi demonstrates the Secchi disk, which measures water clarity, aboard Pope Pius IX's yacht, the L’Immaculata Concezion.