Properties of the Number 21012

Twenty-One Thousand Twelve

Basics

Value: 21011 → 21012 → 21013

Parity: even

Prime: No

Previous Prime: 21011

Next Prime: 21013

Digit Sum: 6

Digital Root: 6

Palindrome: Yes

Factorization: 2 ² × 3 × 17 × 103

Divisors: 1, 2, 3, 4, 6, 12, 17, 34, 51, 68

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001000010100

Octal: 51024

Duodecimal: 101B0

Hexadecimal: 5214

Square: 441504144

Square Root: 144.95516548229662

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

Number of collinear point-triples in an n X n grid. A938

Palindromic in bases 10 and 32. A99165

n written in fractional base 3/2. A24629

Palindromes in base 3 (written in base 3). A118594

Palindromic cyclops numbers. A138131

Palindromic and divisible by 4. A45639

Star of David matchstick numbers: a(n) = 6·n*(3·n+1). A45946

Sum of the smallest parts in the partitions of n into 8 parts. A308990

Numbers that are the sum of seven fourth powers in six or more ways. A345572

Numbers that are the sum of seven fourth powers in exactly six ways. A345828