Properties of the Number 21122

Twenty-One Thousand One Hundred Twenty-Two

Basics

Value: 21121 → 21122 → 21123

Parity: even

Prime: No

Previous Prime: 21121

Next Prime: 21139

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 2 × 59 × 179

Divisors: 1, 2, 59, 118, 179, 358, 10561, 21122

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101001010000010

Octal: 51202

Duodecimal: 10282

Hexadecimal: 5282

Square: 446138884

Square Root: 145.33409785731632

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 magic labelings of the prism graph I X C₇ with magic sum n. A244873

List of primitive words over the alphabet {1,2}. A213969

The Wythoff representation of n: an alternative way of presenting A189921. A317208

Negasemiternary (or NST) representation of n. A355904

The word 1 belongs to the sequence, and whenever a word w belongs to the sequence, then the words consisting of 1's and 2's whose run lengths transform equals w also belong to the sequence. A376637

Numbers with digits 1 and 2 and at least one of each. A111066

Minimal representation (considered minimal in any canonical base b >= 3) of n in a binary system using two distinct digits "1" and "2", not allowing zeros, where a digit d in position p (p = 1,2,3,...,n) represents the value d^p. A235860

Replace n with concatenation of its divisors >1. A37277

Consider the version of the Collatz or 3x+1 problem where x -> x/2 if·is even, x -> (3x+1)/2 if·is odd. Define the stopping time of·to be the number of steps needed to reach 1. Sequence gives the number of integers·with stopping time n. A60322

Expansion of (-2+3·x+3·x²+4·x³+3·x⁴-5·x⁵)/((x-1)*(x+1)*(1+x²)*(x²-3·x+1)). A111666