| Base | Representation |
|---|---|
| bin | 1001000110101100011010… |
| … | …01011101010100110111100 |
| 3 | 2121220000020122002201201100 |
| 4 | 10203112031023222212330 |
| 5 | 10111011420032242340 |
| 6 | 110325341212013100 |
| 7 | 4134325164242511 |
| oct | 443261513524674 |
| 9 | 77800218081640 |
| 10 | 20021211212220 |
| 11 | 6419a47860799 |
| 12 | 22b42b3161190 |
| 13 | b22cb88aa39a |
| 14 | 4d3063351308 |
| 15 | 24abe7104830 |
| hex | 12358d2ea9bc |
20021211212220 has 36 divisors (see below), whose sum is σ = 60731007344280. Its totient is φ = 5338989656544.
The previous prime is 20021211212179. The next prime is 20021211212227. The reversal of 20021211212220 is 2221211212002.
It is a happy number.
20021211212220 is a `hidden beast` number, since 2 + 0 + 0 + 21 + 211 + 212 + 220 = 666.
It is a tau number, because it is divible by the number of its divisors (36).
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 = 20021211212193 and 20021211212202.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (20021211212227) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55614475410 + ... + 55614475769.
It is an arithmetic number, because the mean of its divisors is an integer number (1686972426230).
Almost surely, 220021211212220 is an apocalyptic number.
20021211212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
20021211212220 is an abundant number, since it is smaller than the sum of its proper divisors (40709796132060).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20021211212220 is a wasteful number, since it uses less digits than its factorization.
20021211212220 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 111228951194 (or 111228951189 counting only the distinct ones).
The product of its (nonzero) digits is 128, while the sum is 18.
Adding to 20021211212220 its reverse (2221211212002), we get a palindrome (22242422424222).
The spelling of 20021211212220 in words is "twenty trillion, twenty-one billion, two hundred eleven million, two hundred twelve thousand, two hundred twenty".
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