| Base | Representation |
|---|---|
| bin | 1100010110100010110… |
| … | …1010101001011110100 |
| 3 | 202021202021202121020220 |
| 4 | 3011220231111023310 |
| 5 | 11434101242024340 |
| 6 | 241253223054340 |
| 7 | 21221523116622 |
| oct | 3055055251364 |
| 9 | 667667677226 |
| 10 | 212210111220 |
| 11 | 81aa8091508 |
| 12 | 351648a13b0 |
| 13 | 1701bb6b363 |
| 14 | a3b1994512 |
| 15 | 57c0399ed0 |
| hex | 3168b552f4 |
212210111220 has 48 divisors (see below), whose sum is σ = 594208294848. Its totient is φ = 56587459840.
The previous prime is 212210111219. The next prime is 212210111221. The reversal of 212210111220 is 22111012212.
212210111220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is an interprime number because it is at equal distance from previous prime (212210111219) and next prime (212210111221).
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 212210111220.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (212210111221) 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 15 ways as a sum of consecutive naturals, for example, 3504400 + ... + 3564440.
It is an arithmetic number, because the mean of its divisors is an integer number (12379339476).
Almost surely, 2212210111220 is an apocalyptic number.
212210111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
212210111220 is an abundant number, since it is smaller than the sum of its proper divisors (381998183628).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
212210111220 is a wasteful number, since it uses less digits than its factorization.
212210111220 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 118960 (or 118958 counting only the distinct ones).
The product of its (nonzero) digits is 32, while the sum is 15.
Adding to 212210111220 its reverse (22111012212), we get a palindrome (234321123432).
The spelling of 212210111220 in words is "two hundred twelve billion, two hundred ten million, one hundred eleven thousand, two hundred twenty".
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