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That is probably a correct output.

You have to remember that UTM is in reference to some fixed point on a grid. If you are significantly closer in the x direction, then it is totally reasonable that the x coordinate will be powers of 10 smaller than the y coordinate.

As a quick sanity check, I use the Geotool: For your coordinates

This gives you UTM coordinates: 33T 611320 5138999, which seems to be in line with the ones that you got with the UTM odometry node. The first digits represent the zone that you are in, which you can look up on a map like the following. The next numbers describe your position, in reference to a central meridian plus a "false northing" and "false easting" to insure that negative numbers will never be a possibility.

You may want to read up a bit more on UTM, Wikipedia has a really good explanation of the reasoning behind UTM.