It's well more than trillions.
There are 8 billion ants for each person on the planet.
That, alone, is 8x10^9 * 7x10^9.
That's 56 x 10^18 organisms in just ants.
That number spelt out, is 56,000,000,000,000,000,000
That doesn't include the countless other animals on the planet.
The number might be around 10^20. My guess.
the truth is there is so many animals on this planet that nobody really knows for sure just look at how many bugs and people their are, then also no one has been to the very bottom of the ocean so who knows how many fish and other wild life is down there
if your asking how many animals live in the world, there are a lot nobody knows for sure how many there are not even scientists know how many there are! but there are a lot.