| Base | Representation |
|---|---|
| bin | 1100010101110011101… |
| … | …0011100011100001100 |
| 3 | 202021020111101210120200 |
| 4 | 3011130322130130030 |
| 5 | 11433200112102340 |
| 6 | 241221433413500 |
| 7 | 21213601104021 |
| oct | 3053472343414 |
| 9 | 667214353520 |
| 10 | 212012222220 |
| 11 | 81a06410587 |
| 12 | 3510a56a290 |
| 13 | 16cb9b72b86 |
| 14 | a3935a1548 |
| 15 | 57acd0b330 |
| hex | 315ce9c70c |
212012222220 has 144 divisors (see below), whose sum is σ = 661641603168. Its totient is φ = 54912245760.
The previous prime is 212012222197. The next prime is 212012222221. The reversal of 212012222220 is 22222210212.
212012222220 is a `hidden beast` number, since 21 + 201 + 2 + 222 + 220 = 666.
212012222220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a junction number, because it is equal to n+sod(n) for n = 212012222193 and 212012222202.
It is not an unprimeable number, because it can be changed into a prime (212012222221) 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 47 ways as a sum of consecutive naturals, for example, 3815235 + ... + 3870405.
Almost surely, 2212012222220 is an apocalyptic number.
212012222220 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 212012222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330820801584).
212012222220 is an abundant number, since it is smaller than the sum of its proper divisors (449629380948).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
212012222220 is a wasteful number, since it uses less digits than its factorization.
212012222220 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 55800 (or 55795 counting only the distinct ones).
The product of its (nonzero) digits is 256, while the sum is 18.
Adding to 212012222220 its reverse (22222210212), we get a palindrome (234234432432).
The spelling of 212012222220 in words is "two hundred twelve billion, twelve million, two hundred twenty-two thousand, two hundred twenty".
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