| Base | Representation |
|---|---|
| bin | 10110101111101011… |
| … | …01100010100100000 |
| 3 | 1011112000100201110210 |
| 4 | 23113311230110200 |
| 5 | 200002021024300 |
| 6 | 5335410254120 |
| 7 | 611413506201 |
| oct | 132765542440 |
| 9 | 34460321423 |
| 10 | 12211111200 |
| 11 | 51a6943642 |
| 12 | 2449587340 |
| 13 | 11c7b0c3b2 |
| 14 | 83ba935a8 |
| 15 | 4b7072050 |
| hex | 2d7d6c520 |
12211111200 has 144 divisors (see below), whose sum is σ = 41117993280. Its totient is φ = 3143992320.
The previous prime is 12211111193. The next prime is 12211111201. The reversal of 12211111200 is 211111221.
12211111200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a super-2 number, since 2×122111112002 (a number of 21 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (12).
It is not an unprimeable number, because it can be changed into a prime (12211111201) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18124 + ... + 157323.
It is an arithmetic number, because the mean of its divisors is an integer number (285541620).
Almost surely, 212211111200 is an apocalyptic number.
12211111200 is a gapful number since it is divisible by the number (10) 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 12211111200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20558996640).
12211111200 is an abundant number, since it is smaller than the sum of its proper divisors (28906882080).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12211111200 is a wasteful number, since it uses less digits than its factorization.
12211111200 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 175499 (or 175486 counting only the distinct ones).
The product of its (nonzero) digits is 8, while the sum is 12.
Adding to 12211111200 its reverse (211111221), we get a palindrome (12422222421).
The spelling of 12211111200 in words is "twelve billion, two hundred eleven million, one hundred eleven thousand, two hundred".
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