Looking on the internet deeply has found these results:

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

around the world 11,980,000,000 results on the web	in the world 12,410,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
like devastations around the world. Natural disasters are occurring around the world. Share your medical/ computing expertise with others around the world. My dad travels around the world helping people. European demand continues to fuel markets around the world. Hundreds of New Orleans Churches around the world partake of communion regularly. Construction's already underway around the world.	No doubt that aviation has contributed to the development of this largest trade and investment relationship in the world. The Union is committed to promoting human rights in the world. Question 8 by Lennart Sacr�deus: Report on freedom of faith and religion in the world. Europe is still the most popular tourist destination in the world. Everything in the world's funny. Most things in the world are insignificant. Gaming's the biggest entertainment industry in the world. No prison in the world is airtight.

around the world

11,980,000,000 results on the web

in the world

12,410,000,000 results on the web

More popular!

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