The number 1 x 1030 is a nonillion (US short scale) or quintillion (European long scale).
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A nonillion is equal to 1 followed by 30 zeros. This is because nonillion is the number 1 with 30 groups of three zeros after it. Each group of three zeros represents a power of 10 (thousand, million, billion, etc.), so in total, a nonillion has 30 zeros.
The product of 1000000000000000000000000000000 and 100000000000000000000000000000000000000000000000000000000000000 is 1 x 10^48, or 1 followed by 48 zeros. This can be obtained by adding the exponents of 10 from each number: 30 + 50 = 80. Therefore, the result is 1 with 48 zeros after it.
1 sextillion 1 septillion 1 octillion
here is a list of numbers starting from million to vigintillion 1 plus 6 zeros is 1 million 1 plus 9 zeros is 1 billion 1 plus 12 zeros is 1 trillion 1 plus 15 zeros is 1 quadrillion 1 plus 18 zeros is 1 quintillion 1 plus 21 zeros is 1 sextillion 1 plus 24 zeros is 1 septillion 1 plus 27 zeros is 1 octillion 1 plus 30 zeros is 1 nonillion 1 plus 33 zeros is 1 decillion 1 plus 36 zeros is 1 undecillion 1 plus 39 zeros is 1 duodecillion 1 plus 42 zeros is 1 tredecillion 1 plus 45 zeros is 1 quattuordecillion 1 plus 48 zeros is 1 quindecillion 1 plus 51 zeros is 1 sexdecillion 1 plus 54 zeros is 1 septendecillion 1 plus 57 zeros is 1 octodecillion 1 plus 60 zeros is 1 novemdecillion 1 plus 63 zeros is 1 vigintillion
It has 21 zeros, because 'Giga' means 'a Billion'. Thus, one GigaTrillion is 1 Billion-Trillion. A billion has 9 zeros, and a trillion has 12 zeros. However, if you are referring to the United Kingdom, a billion has 12 zeros and a trillion has 18 zeros, so it would be 30 zeros.