2,100
2,100 is a composite number, even, a calendar year.
Historical context — 2100 AD
Current millennium spanning the years 2001 to 3000
The third millennium of the Anno Domini or Common Era is the current millennium spanning the years 2001 to 3000.
Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →
Year facts
- Year type
-
Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
- Days in year
- 365
- ISO weeks
- 52
- Started on
-
Friday
January 1, 2100
- Ended on
-
Friday
December 31, 2100
- Friday the 13ths
-
1
One Friday the 13th this year.
- Easter Sunday
-
March 28
Sunday, March 28, 2100
- Decade
-
2100s
2100–2109
- Century
-
21st century
2001–2100
- Millennium
-
3rd millennium
2001–3000
- Years until
-
74
74 years after 2026.
- US presidential election
-
Yes
US holds a presidential election in years divisible by 4 starting from 1788.
- Summer Olympics
- Yes
In other calendars
- Hebrew
-
5860 / 5861 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1523 / 1524 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Metal zodiac:Monkey
Sexagenary cycle position 57 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2643 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1478 / 1479 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
2092 / 2093 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
2022 / 2021 Saka
Indian national calendar; year starts in March.
- Japanese
-
Reiwa 82
Reign-era counting from the start of each emperor's reign.
Properties
Primality
Prime factorization: 2 2 × 3 × 5 2 × 7
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- two thousand one hundred
- Ordinal
- 2100th
- Roman numeral
- MMC
- Binary
- 100000110100
- Octal
- 4064
- Hexadecimal
- 0x834
- Base64
- CDQ=
- One's complement
- 63,435 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 ·
- Egyptian hieroglyphic
- 𓆼𓆼𓍢
- Greek (Milesian)
- ͵βρʹ
- Mayan (base 20)
- 𝋥·𝋥·𝋠
- Chinese
- 二千一百
- Chinese (financial)
- 貳仟壹佰
Digit at this position in famous constants
- π — Pi (π)
- Digit 2,100 = 0
- e — Euler's number (e)
- Digit 2,100 = 3
- φ — Golden ratio (φ)
- Digit 2,100 = 4
- √2 — Pythagoras's (√2)
- Digit 2,100 = 6
- ln 2 — Natural log of 2
- Digit 2,100 = 2
- γ — Euler-Mascheroni (γ)
- Digit 2,100 = 9
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 2100, here are decompositions:
- 11 + 2089 = 2100
- 13 + 2087 = 2100
- 17 + 2083 = 2100
- 19 + 2081 = 2100
- 31 + 2069 = 2100
- 37 + 2063 = 2100
- 47 + 2053 = 2100
- 61 + 2039 = 2100
Showing the first eight; more decompositions exist.
UTF-8 encoding: E0 A0 B4 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.8.52.
- Address
- 0.0.8.52
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.8.52
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 2100 first appears in π at position 3,479 of the decimal expansion (the 3,479ordinal-suffix:th digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.