Properties of the Number -1020101

Twenty Thousand One Hundred One

Basics

Value: -1020102 → -1020101 → -1020100

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 5

Digital Root: 5

Palindrome: No

Factorization: 1020101

Divisors: 1, 1020101

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11111001000011000101

Octal: -3710305

Duodecimal: -412405

Hexadecimal: -f90c5

Square: 1040606050201

Square Root: 1010.0004950493836

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 largest prime of the form x² + 1 <= 2ⁿ. A83849

a(1)=5, a(n) is the smallest prime dividing 4·Q² + 1 where Q is the product of all previous terms in the sequence. A57207

a(0) = 1; for n > 0, a(n) = 1 + 4*∏_i=1..n-1 a(i)². A231830

Primes of the form 1+A162143(k). A164517

Palindromic primes in the sense of A007500 with digits '0', '1' and '2' only. A199302

Base 2i representation of negative integers. A212542

Primes p such that σ(p-1)+σ(p+1) is prime. A67464

Primes p such that the reversal of p is prime and the product of p with its reversal is a palindrome. A161721

a(n) = ( a(n-1)²*a(n-2)²*a(n-3)² + 1 ) / a(n-4), with a(0)=a(1)=a(2)=a(3)=1. A276267

Primes of the form 12·k + 5 generated recursively. Initial prime is 5. General term is a(n) = Min_{p is prime; p divides 1 + 4·Q²; p == 5 (mod 12)}, where Q is the product of previous terms in the sequence. A124986