Partition Table Is Not Getting Dropped?

I am trying to delete the partition, but I am getting error "ORA-01426: numeric overflow"

The original partitioning was:

TABLE_NAME PARTITION_NAME NUM_ROWS
F_TFP_CP_MONTH P_201108 0
F_TFP_CP_MONTH P_201201 (NULL)
F_TFP_CP_MONTH P_201202 (NULL)
F_TFP_CP_MONTH P_99999999 (NULL)
F_TFP_CP_MONTH P_201106 1159130358
F_TFP_CP_MONTH P_201105 0
F_TFP_CP_MONTH P_201104 1212566971
F_TFP_CP_MONTH P_201103 1002557990
F_TFP_CP_MONTH P_201102 0
F_TFP_CP_MONTH P_201101 0
F_TFP_CP_MONTH P_201012 0
F_TFP_CP_MONTH P_201011 0
F_TFP_CP_MONTH P_201010 0
F_TFP_CP_MONTH P_201009 0
F_TFP_CP_MONTH P_201112 (NULL)
F_TFP_CP_MONTH P_201111 (NULL)
F_TFP_CP_MONTH P_201110 (NULL)
F_TFP_CP_MONTH P_201109 (NULL)
F_TFP_CP_MONTH P_201107 1627218307

All partitions were dropped, but three; these three returned the same error when trying to drop them:

SQL> alter table dw.F_TFP_CP_MONTH drop partition P_201112;
alter table dw.F_TFP_CP_MONTH drop partition P_201112
*
ERROR at line 1:
ORA-01426: numeric overflow

SQL> alter table dw.F_TFP_CP_MONTH drop partition P_201111;
alter table dw.F_TFP_CP_MONTH drop partition P_201111
*
ERROR at line 1:
ORA-01426: numeric overflow

SQL> alter table dw.F_TFP_CP_MONTH drop partition P_201110;
alter table dw.F_TFP_CP_MONTH drop partition P_201110
*
ERROR at line 1:
ORA-01426: numeric overflow

So, the situation now is that the table only has these three partitions, and we are not able to empty the table, so that we can later purge it and recover the

space.

free that space and empty the contents of the table?