Nearby Numbers

Positive, nonzero integers within three units

21125

Twenty-One Thousand One Hundred and Twenty-Five

21126

Twenty-One Thousand One Hundred and Twenty-Six

21127

Twenty-One Thousand One Hundred and Twenty-Seven

21129

Twenty-One Thousand One Hundred and Twenty-Nine

21130

Twenty-One Thousand One Hundred and Thirty

21131

Twenty-One Thousand One Hundred and Thirty-One

Scientific Notation

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

2.1128e4

Reciprocal

A number multiplied with its reciprocal is one.

0.0000473305566073457

The reciprocal of 21128.

Palindrome?

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

The number 21128 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 thousand one hundred and twenty-eight is a composite number with 16 total factors (including 1 and itself).   See primes in Base 10 Decimal

A Composite

Composites have more than just these two factors.

Twenty-one thousand one hundred and twenty-eight is a composite number with 16 total factors (including 1 and itself).

Prime Factors

2

Two

19

Nineteen

139

One Hundred and Thirty-Nine

Prime Factorization

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

23 · 191 · 1391 = 21128

Base Conversions

The number twenty-one thousand one hundred and twenty-eight in 35 different bases