PHP 119 bytes

<?php function f($n){$n1=strrev((string)$n);$r=$n+(int)$n1;for($i=2;$i<$r;$i++){if($r%$i==0){echo 0;f($r);}}die('1');}

More readable version:

<?php
 function f($n){
    $n1 = strrev((string)$n);
    $r = $n + (int)$n1;
    for($i=2;$i<$r;$i++){
        if($r%$i == 0) {
            echo 0;
            f($r);
        }
    }
    die('1');
}

f(11431 );

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PHP 114 bytes

<?php function f($n){$n1=strrev((string)$n);$r=$n+(int)$n1;for($i=2;$i<$r;$i++){if($r%$i==0){die('0');}}die('1');}

More readable version:

<?php function f($n) 
{
    $n1 = strrev((string)$n);
    $r = $n + (int)$n1;
    for ($i = 2; $i < $r; $i++) {
        if ($r % $i == 0) {
            die('0');
        }
    }
    die('1');
}

f(11431 );

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I used this thing for counting bytes.