The tally by Johns Hopkins University shows that deaths in the US, Brazil and India make up nearly half that total.
Experts caution that the true figure is probably much higher.
UN Secretary-General António Guterres called it a “mind-numbing” figure and “an agonising milestone”.
“Yet we must never lose sight of each and every individual life,” he said in a video message.
“They were fathers and mothers, wives and husbands, brothers and sisters, friends and colleagues. The pain has been multiplied by the savageness of this disease.”
The development comes nearly 10 months after news of the coronavirus began to emerge from Wuhan, China.