SQLRPGLE Cast Lose Zeros

Hi all

I have this select



Where ODNUD0 = 0 and

ODSTX0 <> 'A' and

CAST(ANOR AS CHAR(4)) concat

CAST(NUOR as CHAR(7)) concat

CAST(NURG as CHAR(7)) < :AnnoNumeRiga And

odcar0 = :B9CDARTL ;



AnnoNumeRiga is a field that contains Year order number and row number like
202100002030000003; the result of

CAST(ANOR AS CHAR(4)) concat

CAST(NUOR as CHAR(7)) concat

CAST(NURG as CHAR(7))



Is "2021203 3"



How can do to leading the zeros in cast so that i have "202100002030000003"
instead of "2021203 3"

Thanks in advance