V$PARAMETER2

Columns
   ___________________________
 
   NUM
   NAME
   TYPE
   VALUE
   ISDEFAULT
   ISSES_MODIFIABLE
   ISSYS_MODIFIABLE
   ISMODIFIED
   ISADJUSTED
   DESCRIPTION
   ORDINAL
   UPDATE_COMMENT

Related:

List of all Parameters

V$NLS_PARAMETERS 
V$NLS_VALID_VALUES 
V$SYSTEM_PARAMETER 
V$PARAMETER