| Base | Representation |
|---|---|
| bin | 10110010110100000… |
| … | …11100101000001000 |
| 3 | 1010222022011020011020 |
| 4 | 23023100130220020 |
| 5 | 144034001133000 |
| 6 | 5302430032440 |
| 7 | 603241331652 |
| oct | 131320345010 |
| 9 | 33868136136 |
| 10 | 12000021000 |
| 11 | 50a8776430 |
| 12 | 23aa948720 |
| 13 | 1193171256 |
| 14 | 81ba256d2 |
| 15 | 4a3776ba0 |
| hex | 2cb41ca08 |
12000021000 has 256 divisors, whose sum is σ = 41369702400. Its totient is φ = 2871648000.
The previous prime is 12000020953. The next prime is 12000021031. The reversal of 12000021000 is 12000021.
It is a happy number.
It is a Harshad number since it is a multiple of its sum of digits (6).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
12000021000 is a modest number, since divided by 21000 gives 12000 as remainder.
It is a self number, because there is not a number n which added to its sum of digits gives 12000021000.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2604699 + ... + 2609301.
It is an arithmetic number, because the mean of its divisors is an integer number (161600400).
Almost surely, 212000021000 is an apocalyptic number.
12000021000 is a gapful number since it is divisible by the number (10) 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 12000021000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20684851200).
12000021000 is an abundant number, since it is smaller than the sum of its proper divisors (29369681400).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12000021000 is a wasteful number, since it uses less digits than its factorization.
12000021000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4717 (or 4703 counting only the distinct ones).
The product of its (nonzero) digits is 4, while the sum is 6.
Adding to 12000021000 its reverse (12000021), we get a palindrome (12012021021).
12000021000 divided by its reverse (12000021) gives a cube (1000 = 103).
The spelling of 12000021000 in words is "twelve billion, twenty-one thousand".
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