SQLite - DB Corrupt - btreeInitPage() Error

The SQLite DB indicates corruption while doing operations. On running the PRAGMA integrity_check, i get the following output

>>>sqlite3 prod.db SQLite version 3.7.9 2011-11-01 00:52:41 Enter ".help" for instructions Enter SQL statements terminated with a ";" sqlite> PRAGMA integrity_check; in database main Page 21: btreeInitPage() returns error code 11 Error: database disk image is malformed sqlite>

1. 
   

   Are there commands to know what caused it ?

   
   


2. 
   

   Does the page number have any significance and can i get to the operation that caused the corruption in any manner ?

   
   

I am not so keen to retrieve the data, but am more interested in fixing the reason that keeps causing it. There were no power shutdown or similar external event that caused it, so i am suspecting the operations to be the culprit for this.