Apple (AAPL) reports its latest quarter's results on Tuesday after the bell. The average analyst revenue estimate is  $49.3 billion versus $37.4 billion last year, according to data compiled by S&P Capital IQ.

Earnings for the quarter are forecasted at an average of $1.81 per share, a 41% increase from the previous year.

Asia is Apple's largest market. In the last quarter, $24.5 billion out of $58 billion total came from Asia compared to $21.3 billion from the Americas.

But some specific markets are more profitable than others. Pre-tax operating profit margins in Japan are 49% while in the Americas and Europe, it's 34%. Greater China and the rest of Asia Pacific see pre-tax operting profit margins of 40% and 38% respeictively.

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Apple is very dependent on iPhone sales. In fiscal year 2014, 56% of the company's $182.8 billion in revenues -- $102 billion -- came from iPhone sales. The iPad came in a distant second, bringing 17% of revenues. Mac products, the company's oldest segment, was responsible for 13% of the top line. A new product line will join the others with this quarter's report, the Apple Watch.

Investors are paying close attention to Apple's cash hoard. In its last reported quarter, Apple had $194 billion in cash and equivalents plus investments. To put that in perspective, only 15 companies in the S&P 500 (^GSPC) -- including Apple -- have a market cap larger than Apple's coffers.

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