Properties of the Number 12021

Twelve Thousand Twenty-One

Basics

Value: 12020 → 12021 → 12022

Parity: odd

Prime: No

Previous Prime: 12011

Next Prime: 12037

Digit Sum: 6

Digital Root: 6

Palindrome: Yes

Factorization: 3 × 4007

Divisors: 1, 3, 4007, 12021

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111011110101

Octal: 27365

Duodecimal: 6B59

Hexadecimal: 2ef5

Square: 144504441

Square Root: 109.64032105024137

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

A convolution triangle of numbers, generalizing Pascal's triangle A007318. A35324

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

Numbers in base -3. A73785

Palindromes in base 4 (written in base 4). A118595

Palindromic cyclops numbers. A138131

Number of maximal subsets of {1..n} of which every subset has a different sum. A325865

Consider all (2n+1)-digit palindromic primes of the form 10...0M0...01 (so that M is a palindrome with <= 2n-1 digits); a(n) = smallest such M. A100026

Triangle, read by rows, given by the product R^-1·P³ using triangular matrices P=A113370, R=A113389. A114153

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having nonzero determinant and commuting with every horizontal or vertical neighbor. A206343

Number of even parts in all partitions of n into distinct parts. A116680