Javascript Error: ParseInt fails when supplied with large numbers

ParseInt returns 1 for when passed any number greater or equal to 1e+21.

var x = 1.0e+2;
console.log( x == 1e+2 );
console.log( parseInt( x, 10 ) == 100 );
console.log( parseFloat( x ) == 100 );
 
var x = 1.0e+21;
console.log( x == 1e+21 );
console.log( parseInt( x, 10 ) == 1 );
console.log( parseFloat( x ) == 1e+21 );

What do you think the problem is?
I think the problem by be because numbers 1e+21 and greater are represented as strings.
ParseInt might only be looking at valid numbers to parse the number to into an integer. Since e in ‘1e21’ is not a number, 1 is the item returned.

Demo: jsbin.com demo

Update:
V8 Issue Page