Properties of the Number 21101

Twenty-One Thousand One Hundred One

Basics

Value: 21100 → 21101 → 21102

Parity: odd

Prime: Yes

Previous Prime: 21089

Next Prime: 21107

Digit Sum: 5

Digital Root: 5

Palindrome: No

Factorization: 21101

Divisors: 1, 21101

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001001101101

Octal: 51155

Duodecimal: 10265

Hexadecimal: 526d

Square: 445252201

Square Root: 145.2618325645109

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Primes whose decimal representation also represents a prime in base 3. A89981

Primes having only {0, 1, 2} as digits. A36953

Primes whose sum of digits is 5. A62341

Primes with arithmetic mean of digits = 1 (sum of digits = number of digits). A69710

Negasemiternary (or NST) representation of n. A355904

Primes with maximal digit = 2. A106100

Partial sums of A000084. A58351

Primes of form 4k+3 written in base 3. A72805

Smallest number requiring n 1's to build using +, * and -. A255641

Prime numbers such that first reversing digits and after squaring equals the result of first-squaring and after-reversing. Primes in A085305. A85306