Properties of the Number 21211

Twenty-One Thousand Two Hundred Eleven

Basics

Value: 21210 → 21211 → 21212

Parity: odd

Prime: Yes

Previous Prime: 21193

Next Prime: 21221

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 21211

Divisors: 1, 21211

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101001011011011

Octal: 51333

Duodecimal: 10337

Hexadecimal: 52db

Square: 449906521

Square Root: 145.6399670420177

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

Primes having only {1, 2, 9} as digits. A385776

Primes whose decimal representation also represents a prime in base 3. A89981

Primes having only {0, 1, 2} as digits. A36953

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

Number of partitions of n whose median is a part. A238478

Primes that contain digits 1 and 2 only. A20450

Primes having only {1, 2, 4} as digits. A260267

Primes with digital product = 4. A107690

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

Primes having only {1, 2, 7} as digits. A260889