| Base | Representation |
|---|---|
| bin | 1100110111101100111… |
| … | …1111101000110111000 |
| 3 | 210010201121120022000220 |
| 4 | 3031323033331012320 |
| 5 | 12110313421041440 |
| 6 | 245324350300040 |
| 7 | 21655224304563 |
| oct | 3157317750670 |
| 9 | 703647508026 |
| 10 | 221111112120 |
| 11 | 858555051a8 |
| 12 | 36a297b7620 |
| 13 | 17b09c685b2 |
| 14 | a9b7b994da |
| 15 | 5b41a1d8d0 |
| hex | 337b3fd1b8 |
221111112120 has 128 divisors (see below), whose sum is σ = 685566720000. Its totient is φ = 56991306240.
The previous prime is 221111112113. The next prime is 221111112127. The reversal of 221111112120 is 21211111122.
It is a happy number.
It is an interprime number because it is at equal distance from previous prime (221111112113) and next prime (221111112127).
It is a Harshad number since it is a multiple of its sum of digits (15).
It is a self number, because there is not a number n which added to its sum of digits gives 221111112120.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (221111112127) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3048031 + ... + 3119729.
It is an arithmetic number, because the mean of its divisors is an integer number (5355990000).
Almost surely, 2221111112120 is an apocalyptic number.
221111112120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 221111112120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342783360000).
221111112120 is an abundant number, since it is smaller than the sum of its proper divisors (464455607880).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
221111112120 is a wasteful number, since it uses less digits than its factorization.
221111112120 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 72573 (or 72569 counting only the distinct ones).
The product of its (nonzero) digits is 16, while the sum is 15.
Adding to 221111112120 its reverse (21211111122), we get a palindrome (242322223242).
The spelling of 221111112120 in words is "two hundred twenty-one billion, one hundred eleven million, one hundred twelve thousand, one hundred twenty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.071 sec. • engine limits •