Looking on the internet deeply has found these results:

on the world is the most popular phrase on the web.

in the world 12,410,000,000 results on the web	on the world 113,210,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Most things in the world are insignificant. Gaming's the biggest entertainment industry in the world. Everything in the world's funny. Europe is still the most popular tourist destination in the world. The Union is committed to promoting human rights in the world. Question 8 by Lennart Sacrédeus: Report on freedom of faith and religion in the world. No prison in the world is airtight. No doubt that aviation has contributed to the development of this largest trade and investment relationship in the world.	Truly the greatest trick someone other than me played on the world. You can't take your revenge on the world by talking. When a good person dies, there should be an impact on the world. Through that earpiece he had a three I left my mark on the world. An analytic perspective on the world around you. second lead on the world. Their impact on the world was not much greater than that of jellyfish or fireflies or woodpeckers.

in the world

12,410,000,000 results on the web

on the world

113,210,000,000 results on the web

More popular!

Most things in the world are insignificant.
Gaming's the biggest entertainment industry in the world.
Everything in the world's funny.
Europe is still the most popular tourist destination in the world.
The Union is committed to promoting human rights in the world.
Question 8 by Lennart Sacrédeus: Report on freedom of faith and religion in the world.
No prison in the world is airtight.
No doubt that aviation has contributed to the development of this largest trade and investment relationship in the world.

Truly the greatest trick someone other than me played on the world.
You can't take your revenge on the world by talking.
When a good person dies, there should be an impact on the world.
Through that earpiece he had a three
I left my mark on the world.
An analytic perspective on the world around you.
second lead on the world.
Their impact on the world was not much greater than that of jellyfish or fireflies or woodpeckers.