PL/SQL :: Output Parameter Does Not Accept Formatted Column Value

Here's my table structure:

<h4><font color="Blue">CREATE TABLE "SSPFUSER05"."PERSONS"
(     SSN NUMBER(13,0),
PIN VARCHAR2(7 BYTE)
);</font>
</h4>

And here's my procedure below:

<h4><font color="Blue">
CREATE OR REPLACE
PROCEDURE SP_SSN_BY_PIN(
V_REQUESTEDPIN IN VARCHAR2,
V_SSN OUT CHAR)
AS
BEGIN
SELECT

[code]....

As you can see the type of the SSN column is NUMBER(13,0). But I leftpad it with 0 and assign it to my output paramter V_SSN, whose type is CHAR. But I get 111196100099 instead of 0111196100099. I've tried TO_CHAR(LPAD(SSN,13,'0')) but still doesn't work. However, if I return the left padded SSN inside a SYS_REFCURSOR I get what I want.