Does your house have a basement?

Each number is 16 in a number system with a different base, starting with base 16 and continuing with bases in descending order, ending with base 2.

$16$ in base $16$ is $10$

$16$ in base $15$ is $11$

$16$ in base $14$ is $12$

$16$ in base $13$ is $13$

$16$ in base $12$ is $14$

$16$ in base $11$ is $15$

$16$ in base $10$ is $16$

$16$ in base $9$ is $17$

$16$ in base $8$ is $20$

$16$ in base $7$ is $22$

$16$ in base $6$ is $24$

$16$ in base $5$ is $31$

$16$ in base $4$ is $100$

$16$ in base $3$ is $\boxed{121}$

$16$ in base $2$ is $10000$

Hence , the answer is $121$ . :)