Laravel/PHP: my unix time stamp is not showing as less than my sistem time

I chose a date earlier this month (february 2) and the unix timestamp is 1612304580000 . I am doing operator to check if that time is less than the current time using PHP's time()

//time() is 1614032830;

$oldTime = 1612304580000;
$oldTime < time() // false;

I am using time() incorrectly?