# 321

The numbers with a 21 subscript use Base 21 Unovigesimal notation.

For more familiar numbers: See Three in Base 10 Decimal

## Nearby Numbers

Positive, nonzero integers within three units

2
221
Two in Base 21 Unovigesimal
4
421
Four in Base 21 Unovigesimal
5
521
Five in Base 21 Unovigesimal
6
621
Six in Base 21 Unovigesimal

## Scientific Notation

Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.

## Reciprocal

A number multiplied with its reciprocal is one.

### `0.721`

The reciprocal of 3 in Base 21 Unovigesimal.

## Palindrome?

A numerical palindrome has the same value when all of its digits are reversed.

The number 321 is a palindrome.

## A Prime Number

A prime number is a positive integer that is divisible only by itself and one.

Three is the 2nd prime number.   See primes in Base 21 Unovigesimal

## Not A Composite

Composites have more than just these two factors.

Three is not a composite number because it has exactly two factors: One and Three

## Prime Factors

The prime factors of a positive integer are the integers that divide it exactly and are also prime.

The number three has the following 1 prime factor:

3
321
Three in Base 21 Unovigesimal

## Prime Factorization

The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities

## Base Conversions

The number three in 35 different bases