| Base | Representation |
|---|---|
| bin | 1001100110101111001011… |
| … | …11101001100110011011000 |
| 3 | 2202210021010021201222010202 |
| 4 | 10303113211331030303120 |
| 5 | 10232031242312020440 |
| 6 | 112531224344401332 |
| 7 | 4310013052346444 |
| oct | 463274575146330 |
| 9 | 82707107658122 |
| 10 | 21122212220120 |
| 11 | 6803975163840 |
| 12 | 2451762176248 |
| 13 | ba2a7bb8650b |
| 14 | 53046b749824 |
| 15 | 2696858d5615 |
| hex | 1335e5f4ccd8 |
21122212220120 has 256 divisors, whose sum is σ = 54548373749760. Its totient is φ = 7290017280000.
The previous prime is 21122212220093. The next prime is 21122212220129. The reversal of 21122212220120 is 2102221222112.
It is a super-2 number, since 2×211222122201202 (a number of 27 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (20).
It is a junction number, because it is equal to n+sod(n) for n = 21122212220092 and 21122212220101.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (21122212220129) by changing a digit.
It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3087587900 + ... + 3087594740.
It is an arithmetic number, because the mean of its divisors is an integer number (213079584960).
Almost surely, 221122212220120 is an apocalyptic number.
21122212220120 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 21122212220120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27274186874880).
21122212220120 is an abundant number, since it is smaller than the sum of its proper divisors (33426161529640).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21122212220120 is a wasteful number, since it uses less digits than its factorization.
21122212220120 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 11218 (or 11214 counting only the distinct ones).
The product of its (nonzero) digits is 256, while the sum is 20.
Adding to 21122212220120 its reverse (2102221222112), we get a palindrome (23224433442232).
The spelling of 21122212220120 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred twelve million, two hundred twenty thousand, one hundred twenty".
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