Properties of the Number -221121

Two Hundred Twenty-One Thousand One Hundred Twenty-One

Basics

Value: -221122 → -221121 → -221120

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 79 × 311

Divisors: 1, 3, 9, 79, 237, 311, 711, 933, 2799, 24569

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110101111111000001

Octal: -657701

Duodecimal: -A7B69

Hexadecimal: -35fc1

Square: 48894496641

Square Root: 470.2350476091717

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(n) is the reverse concatenation of divisors of n. A176558

List of co-Lyndon words on {1,2} sorted first by length and then lexicographically. A329318

List of words over {1,2} with equal numbers of 1's and 2's. A214218

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

Successive generations of the variant of the Kolakoski sequence described in A042942. A54349

Unique representation of nonnegative numbers by iterated tribonacci A, B and C sequences. A316713

Number of ways writing 2ⁿ as a sum of two nonprime numbers. A62306

a(n) = A176558(A175354(n)) = numbers m as reverse concatenations of divisors of numbers from A175354, where A175354 = numbers k such that reverse concatenations of divisors of k are nonprimes. A176588

Numbers k such that σ(k) = φ(k+1) + φ(k) + φ(k-1). A65986