Number with leading zeroes gets changed in JavaScript

I am calling a javascript function from php using a print statement to print out html code, and I am passing in an integer. However, the value when it is passed in php is not matching the number that the javascript function receives, and I have no clue why.

Here is the php that calls the javascript function:

$upc = $items[$i]->GetUPC();
print "upc: " . $upc . "<br/>";

$delete = "<a href='#' onclick='removeFromCart(". $upc .")'><img src='".$redx."' height='17' width='17' /></a>";

The print statement prints out the value: 0011110416605

And on the page, using view source, here is the tag for this:

<a href='#' onclick='removeFromCart(0011110416605)'>

Here is the javascript function that is being called:

function removeFromCart(itemID){
    var option = document.getElementById("select_cart");
    var selected = option.options[option.selectedIndex].value;

    alert(itemID);

    loadCart(itemID,selected,"","remove");
}

The alert box is printing out the number: 1226972549

I could understand if it was removing the leading 0's, but this number is completely different. Does anyone know why this may be?