Properties of the Number 21201

Twenty-One Thousand Two Hundred One

Basics

Value: 21200 → 21201 → 21202

Parity: odd

Prime: No

Previous Prime: 21193

Next Prime: 21211

Digit Sum: 6

Digital Root: 6

Palindrome: No

Factorization: 3 × 37 × 191

Divisors: 1, 3, 37, 111, 191, 573, 7067, 21201

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101001011010001

Octal: 51321

Duodecimal: 10329

Hexadecimal: 52d1

Square: 449482401

Square Root: 145.6056317592146

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

n written in fractional base 3/2. A24629

Numbers k such that the decimal number concat(4,k) is a square. A273359

Numbers with digits in {0,1,2} such that every other digit is strictly less than its neighbors. A306105

Partial sums of A255744. A255765

a(n) = 11ⁿ+9ⁿ-1ⁿ. A155670

a(n)/A002939(n+1) is the Kirchhoff index of the join of the disjoint union of two complete graphs on n vertices with the empty graph on n+1 vertices. A338109

4-Smith numbers. A103125

Indices of heptagonal numbers that are also decagonal. A203409

Number of zero-sum -n..n arrays of 4 elements with first and second differences also in -n..n. A201875

Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite FER = Ferrierite Na2Mg2[Al6Si30O72].18H2O starting with a T3 atom. A19131