A trillion dollars is 1 followed by 12 zeroes. If you had a trillion dollars:
Firstly, you don't need to work anymore, you would be the richest person in the world and that too by a huge margin.
Secondly, one can buy a one bedroom apartment for $1 million in San Francisco. With 1 Trillion dollars, one could buy an apartment for everybody in the city.
Thirdly, there are supposed to be 1 trillion species in the world. With 1 trillion dollars, you could give 1 dollar to every species.
Lastly, one dollar weighs 1 gram, 1 trillion dollars weigh around 2.2 billion pounds or about 600,000 cars. Good luck with carrying your 1 trillion dollars.