It’s difficult question to answer for a couple of reasons

  1. How would you define an international airport? Would this be only airports where regularly scheduled commercial flights operate, or would this also include smaller airfields where private jets on international flights can land? The definition will cause variations in the total number
  2. Bodies such as the International Civil Aviation Organization (ICAO) or International Air Transport Association (IATA) assign codes to airports. However, there is no way to distinguish between airports offering international and domestic services
  3. An airport can easily start or stop international flights based on demand, as they only need to add/remove passport control and customs staff, making it tricky to keep tracking the status of each and every airport across the world

 you can see: Wikipedia page on international airports says that there are 1,200 international airports worldwide record 2016.

See the List of international airports by country

To know the World Top 30 Airports codes 

The top 20 largest airports in the world by passenger number 2018

List Of Airports in Malaysia

 list of major international airports in India

List of airports in India

list of airports in canada

List of airports in the United States

List of airports in Spain –

List of the busiest airports in Europe

List of airports in France