Google has reported that its first-quarter revenues jumped by nearly a third to US$14 billion, while profits rose to US$3.35 billion, compared to US$2.89 billion a year ago.

Google said that its revenues from outside of the United States totaled $7.1 billion, representing 55% of total Google revenues in the first quarter of 2013, compared to 54% in the fourth quarter of 2012 and in the first quarter of 2012.

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The aggregate cost-per-click on the company’s advertising was down 4% year-over-year, as well as down 4% quarter-over-quarter.

The company also revealed that an unspecified portion of its mobile app revenues is being paid to the mobile networks carrying its Android smartphones. The mobile app revenue is split with 70% going to the developer, and 30% understood to be going to Google. In an accounting change, the company noted that its 30% is also split in some manner with the mobile networks.

Motorola Mobile revenues were $1.02 billion, or 7% of consolidated revenues in the first quarter of 2013. However, Motorola also posted a loss of US$271 million.

Patrick Pichette – Senior Vice President and Chief Financial Officer noted in the conference call that the overall business was however down 3% quarter-over-quarter driven by the softness in Motorola Mobility segment specifically.