Perfect Square
129439018774129 is a perfect square (11377127 × 11377127)
129,439,018,774,129
One hundred and twenty-nine trillion, four hundred and thirty-nine billion, eighteen million, seven hundred and seventy-four thousand, one hundred and twenty-nine.
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Odd
129439018774129 is odd
Previous odd number is 129439018774127
Next odd number is 129439018774131