| Base | Representation |
|---|---|
| bin | 1100110111101100111… |
| … | …1111101001000011110 |
| 3 | 210010201121120022011200 |
| 4 | 3031323033331020132 |
| 5 | 12110313421042342 |
| 6 | 245324350300330 |
| 7 | 21655224305100 |
| oct | 3157317751036 |
| 9 | 703647508150 |
| 10 | 221111112222 |
| 11 | 85855505290 |
| 12 | 36a297b76a6 |
| 13 | 17b09c68660 |
| 14 | a9b7b99570 |
| 15 | 5b41a1d94c |
| hex | 337b3fd21e |
221111112222 has 288 divisors, whose sum is σ = 672427907424. Its totient is φ = 51579763200.
The previous prime is 221111112169. The next prime is 221111112263. The reversal of 221111112222 is 222211111122.
221111112222 is a `hidden beast` number, since 221 + 111 + 112 + 222 = 666.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a nude number because it is divisible by every one of its digits.
It is a zygodrome in base 10.
It is a junction number, because it is equal to n+sod(n) for n = 221111112195 and 221111112204.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4642972 + ... + 4690352.
It is an arithmetic number, because the mean of its divisors is an integer number (2334819123).
Almost surely, 2221111112222 is an apocalyptic number.
221111112222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 221111112222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336213953712).
221111112222 is an abundant number, since it is smaller than the sum of its proper divisors (451316795202).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
221111112222 is a wasteful number, since it uses less digits than its factorization.
221111112222 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 47464 (or 47454 counting only the distinct ones).
The product of its digits is 64, while the sum is 18.
Adding to 221111112222 its reverse (222211111122), we get a palindrome (443322223344).
It can be divided in two parts, 2211111122 and 22, that multiplied together give a palindrome (48644444684).
The spelling of 221111112222 in words is "two hundred twenty-one billion, one hundred eleven million, one hundred twelve thousand, two hundred twenty-two".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.077 sec. • engine limits •