Properties of the Number 21102

Twenty-One Thousand One Hundred Two

Basics

Value: 21101 → 21102 → 21103

Parity: even

Prime: No

Previous Prime: 21101

Next Prime: 21107

Digit Sum: 6

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 3517

Divisors: 1, 2, 3, 6, 3517, 7034, 10551, 21102

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001001101110

Octal: 51156

Duodecimal: 10266

Hexadecimal: 526e

Square: 445294404

Square Root: 145.26527458412076

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

Negasemiternary (or NST) representation of n. A355904

Start with the hexagonal tile of the Shield tiling and recursively apply the substitution rule. a(n) is the number of square tiles after n iterations. A298679

Start with a square; at each stage add a square at each expandable vertex so that the ratio of the side of the squares at stage n+1 and at stage n is the golden ratio φ=0.618...; a(n) is the number of squares in a portion of the n-th stage (see below). A269965

Admirable Harshad numbers n such that the subtracted divisor is equal to the digital sum of n. A111948

Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of max{j mod i, i mod j} (A204016). A204017

Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and -2<=w+x+y<=2. A211616

Admirable Harshad numbers such that the subtracted divisor is also a Harshad number. A109396

Numbers n such that d(1)¹ + d(2)² + ... + d(p)^p and d(1)^p + d(2)^p-1 +... + d(p)¹ are squares, where d(i), i=1..p, are the digits of n. A178360

Numbers 3·n + 2 written in base 3. A190642

Number of length-n ternary words having at most 5 palindromic subwords (including the empty word). A329023