In Base 3 Ternary Is
The numbers with a 3 subscript use Base 3 Ternary notation.
For more familiar numbers: See Twenty-One in Base 10 Decimal
Positive, nonzero integers within three units
Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.
A number multiplied with its reciprocal is one.
The reciprocal of 21 in Base 3 Ternary.
A numerical palindrome has the same value when all of its digits are reversed.
The number 2103 is not a palindrome.
Not A Prime Number
A prime number is a positive integer that is divisible only by itself and one.
Twenty-one is a composite number with 4 total factors (including 1 and itself). See primes in Base 3 Ternary
Composites have more than just these two factors.
Twenty-one is a composite number with 4 total factors (including 1 and itself).
The number twenty-one has the following 2 prime factors:
The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities
The number twenty-one in 35 different bases