| Base | Representation |
|---|---|
| bin | 1001001001010011111000… |
| … | …10010111010000110010100 |
| 3 | 2122012121022200111201102100 |
| 4 | 10210221330102322012110 |
| 5 | 10114000034241224340 |
| 6 | 110434531052442100 |
| 7 | 4143660233154105 |
| oct | 444517422720624 |
| 9 | 78177280451370 |
| 10 | 20111122211220 |
| 11 | 6454096213037 |
| 12 | 2309806179330 |
| 13 | b2b61713a341 |
| 14 | 4d75524c23ac |
| 15 | 24d20a750830 |
| hex | 124a7c4ba194 |
20111122211220 has 288 divisors, whose sum is σ = 67105881722880. Its totient is φ = 4856960828160.
The previous prime is 20111122211209. The next prime is 20111122211227. The reversal of 20111122211220 is 2211222111102.
20111122211220 is a `hidden beast` number, since 2 + 0 + 111 + 122 + 211 + 220 = 666.
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 = 20111122211193 and 20111122211202.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (20111122211227) by changing a digit.
It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5456985 + ... + 8366655.
It is an arithmetic number, because the mean of its divisors is an integer number (233006533760).
Almost surely, 220111122211220 is an apocalyptic number.
20111122211220 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 20111122211220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33552940861440).
20111122211220 is an abundant number, since it is smaller than the sum of its proper divisors (46994759511660).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20111122211220 is a wasteful number, since it uses less digits than its factorization.
20111122211220 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2909795 (or 2909790 counting only the distinct ones).
The product of its (nonzero) digits is 64, while the sum is 18.
Adding to 20111122211220 its reverse (2211222111102), we get a palindrome (22322344322322).
The spelling of 20111122211220 in words is "twenty trillion, one hundred eleven billion, one hundred twenty-two million, two hundred eleven thousand, two hundred twenty".
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