| Base | Representation |
|---|---|
| bin | 111011111011111… |
| … | …0100100110110100 |
| 3 | 12012011021120212201 |
| 4 | 1313313310212310 |
| 5 | 13104321401400 |
| 6 | 531321154244 |
| 7 | 100560153511 |
| oct | 16767644664 |
| 9 | 5164246781 |
| 10 | 2011122100 |
| 11 | 942253889 |
| 12 | 48162b984 |
| 13 | 26086c8a0 |
| 14 | 151152308 |
| 15 | bb85d06a |
| hex | 77df49b4 |
2011122100 has 216 divisors, whose sum is σ = 5137124328. Its totient is φ = 678912000.
The previous prime is 2011122079. The next prime is 2011122107. The reversal of 2011122100 is 12211102.
It can be written as a sum of positive squares in 36 ways, for example, as 1059893136 + 951228964 = 32556^2 + 30842^2 .
It is a super-2 number, since 2×20111221002 = 8089224202216820000, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (10).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2011122107) by changing a digit.
It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 19912050 + ... + 19912150.
It is an arithmetic number, because the mean of its divisors is an integer number (23782983).
Almost surely, 22011122100 is an apocalyptic number.
2011122100 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 2011122100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2568562164).
2011122100 is an abundant number, since it is smaller than the sum of its proper divisors (3126002228).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2011122100 is a wasteful number, since it uses less digits than its factorization.
2011122100 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 215 (or 191 counting only the distinct ones).
The product of its (nonzero) digits is 8, while the sum is 10.
The square root of 2011122100 is about 44845.5360097301. The cubic root of 2011122100 is about 1262.2522286046.
Adding to 2011122100 its reverse (12211102), we get a palindrome (2023333202).
The spelling of 2011122100 in words is "two billion, eleven million, one hundred twenty-two thousand, one hundred".
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