| Base | Representation |
|---|---|
| bin | 1001100011100010010010… |
| … | …10111110110101101101110 |
| 3 | 2202101202012010001010010100 |
| 4 | 10301301021113312231232 |
| 5 | 10223231002004032342 |
| 6 | 112404513152451530 |
| 7 | 4266040114414326 |
| oct | 461611127665556 |
| 9 | 82352163033110 |
| 10 | 21012211002222 |
| 11 | 6771257361700 |
| 12 | 2434382b49ba6 |
| 13 | b9559b35117b |
| 14 | 528dd432a286 |
| 15 | 26689864be4c |
| hex | 131c495f6b6e |
21012211002222 has 72 divisors (see below), whose sum is σ = 50064645561840. Its totient is φ = 6364388764800.
The previous prime is 21012211002197. The next prime is 21012211002281. The reversal of 21012211002222 is 22220011221012.
It is a happy number.
21012211002222 is a `hidden beast` number, since 210 + 1 + 221 + 10 + 0 + 2 + 222 = 666.
It is a super-2 number, since 2×210122110022222 (a number of 27 digits) contains 22 as substring.
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 = 21012211002195 and 21012211002204.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2474479 + ... + 6938837.
It is an arithmetic number, because the mean of its divisors is an integer number (695342299470).
Almost surely, 221012211002222 is an apocalyptic number.
21012211002222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 21012211002222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25032322780920).
21012211002222 is an abundant number, since it is smaller than the sum of its proper divisors (29052434559618).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21012211002222 is a wasteful number, since it uses less digits than its factorization.
21012211002222 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4466550 (or 4466536 counting only the distinct ones).
The product of its (nonzero) digits is 128, while the sum is 18.
Adding to 21012211002222 its reverse (22220011221012), we get a palindrome (43232222223234).
The spelling of 21012211002222 in words is "twenty-one trillion, twelve billion, two hundred eleven million, two thousand, two hundred twenty-two".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.071 sec. • engine limits •