million = 10<sup>6</sup>
billion = 10<sup>9</sup>
trillion = 10<sup>12</sup>
quadrillion = 10<sup>15</sup>
quintillion = 10<sup>18</sup>
hexillion = 10<sup>21</sup>
heptillion = 10<sup>24</sup>
octillion = 10<sup>27</sup>
nonillion = 10<sup>30</sup>
decillion = 10<sup>33</sup>
unodecillion = 10<sup>36</sup>
duodecillion = 10<sup>39</sup>
etc.