| Base | Representation |
|---|---|
| bin | 1100010110100000101… |
| … | …1011010111111100000 |
| 3 | 202021201200000222200200 |
| 4 | 3011220023122333200 |
| 5 | 11434042003101422 |
| 6 | 241252304345200 |
| 7 | 21221354425065 |
| oct | 3055013327740 |
| 9 | 667650028620 |
| 10 | 212201222112 |
| 11 | 81aa306aa40 |
| 12 | 35161915200 |
| 13 | 1701a078329 |
| 14 | a3b071cc6c |
| 15 | 57be6e12ac |
| hex | 31682dafe0 |
212201222112 has 144 divisors (see below), whose sum is σ = 658621611648. Its totient is φ = 64272579840.
The previous prime is 212201222111. The next prime is 212201222119. The reversal of 212201222112 is 211222102212.
It is a happy number.
212201222112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a tau number, because it is divible by the number of its divisors (144).
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (212201222111) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7090893 + ... + 7120755.
It is an arithmetic number, because the mean of its divisors is an integer number (4573761192).
Almost surely, 2212201222112 is an apocalyptic number.
212201222112 is a gapful number since it is divisible by the number (22) 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 212201222112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329310805824).
212201222112 is an abundant number, since it is smaller than the sum of its proper divisors (446420389536).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
212201222112 is a wasteful number, since it uses less digits than its factorization.
212201222112 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 32133 (or 32122 counting only the distinct ones).
The product of its (nonzero) digits is 128, while the sum is 18.
Adding to 212201222112 its reverse (211222102212), we get a palindrome (423423324324).
The spelling of 212201222112 in words is "two hundred twelve billion, two hundred one million, two hundred twenty-two thousand, one hundred twelve".
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