Properties of the Number 21113

Twenty-One Thousand One Hundred Thirteen

Basics

Value: 21112 → 21113 → 21114

Parity: odd

Prime: No

Previous Prime: 21107

Next Prime: 21121

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 43 × 491

Divisors: 1, 43, 491, 21113

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001001111001

Octal: 51171

Duodecimal: 10275

Hexadecimal: 5279

Square: 445758769

Square Root: 145.3031314184247

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 partitions p of n such that (maximal multiplicity over the parts of p) = number of 1s in p. A241131

Numbers of the form HMMSS with primes H < 24 and MM, SS < 60, for which the number of seconds after midnight, 3600·H+60·MM+SS, is also prime. A295011

Row sums of the triangle in A122820. A77388

Indices n such that the 3 X 3 matrix with components (row by row) prime(n+k), 0 <= k <= 8, has zero determinant. A117345

Smallest sum of n consecutive odd primes which is a multiple of n. A132810

Expansion of (1 - x)/(1 - 28·x + x²). A159668

Prefix primes in base 8 (written in base 8). A24768

a(n) = n³ - n² - 2·n + 1. A123972

Denominators of continued fraction convergents to sqrt(195). A41363

Numbers that eventually reach 1 under "x -> sum of 4th power of digits of x". A219111