If Carl Icahn, whose $6.8 billion in AAPL holdings makes him nearly a 6x bigger holder of the stock than the Swiss National Bank, is correct and AAPL is truly worth $240/share today, or about $1.4 trillion, roughly equivalent to 9% of U.S. GDP, then this is how AAPL would rank if it were a sovereign nation (and yes, we know comparing market cap to GDP is idiotic, but so is everything else these days).
For the purists, at $240/share, AAPL would be 2.2x larger than the entire market cap of the Italian or Swedish stock market, 1.9x larger than all Spanish public companies combined, it would be almost the same size as the market cap of all Swiss companies, and is just about 70% of the market cap of Germany or France.