| Base | Representation |
|---|---|
| bin | 10110101111110010… |
| … | …01000010010111100 |
| 3 | 1011112002001111102220 |
| 4 | 23113321020102330 |
| 5 | 200002233342340 |
| 6 | 5335441445340 |
| 7 | 611424251112 |
| oct | 132771102274 |
| 9 | 34462044386 |
| 10 | 12212012220 |
| 11 | 51a73a9591 |
| 12 | 2449940850 |
| 13 | 11c8066545 |
| 14 | 83bc49ab2 |
| 15 | 4b719ded0 |
| hex | 2d7e484bc |
12212012220 has 96 divisors (see below), whose sum is σ = 36254433600. Its totient is φ = 3060793344.
The previous prime is 12212012179. The next prime is 12212012221. The reversal of 12212012220 is 2221021221.
It is a super-2 number, since 2×122120122202 (a number of 21 digits) contains 22 as substring.
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 12212012220.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12212012221) 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, 776596 + ... + 792164.
It is an arithmetic number, because the mean of its divisors is an integer number (377650350).
Almost surely, 212212012220 is an apocalyptic number.
12212012220 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 12212012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18127216800).
12212012220 is an abundant number, since it is smaller than the sum of its proper divisors (24042421380).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12212012220 is a wasteful number, since it uses less digits than its factorization.
12212012220 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 16367 (or 16365 counting only the distinct ones).
The product of its (nonzero) digits is 64, while the sum is 15.
Adding to 12212012220 its reverse (2221021221), we get a palindrome (14433033441).
Subtracting from 12212012220 its reverse (2221021221), we obtain a palindrome (9990990999).
The spelling of 12212012220 in words is "twelve billion, two hundred twelve million, twelve thousand, two hundred twenty".
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