This name would be ideally suited to a company in the AR or business sectors.
The word "123stop" contains seven characters and three syllables. Three syllable names are used by established brands like Grammarly, Microsoft and Santander.
123stop.com is a dot-com domain. Dot com domains are the most valued top-level-domain in the world, used by famous websites like facebook.com. When you own a dot-com, it is much easier to rank for your own name in search engines.