Base | Representation |
---|---|
bin | 1001101001100101011000… |
… | …11011011010100010110000 |
3 | 2210010121121110121121010120 |
4 | 10310302230123122202300 |
5 | 10240132111003410000 |
6 | 113044203043130240 |
7 | 4320045105034425 |
oct | 464625433324260 |
9 | 83117543547116 |
10 | 21220031310000 |
11 | 6841401518886 |
12 | 2468701673980 |
13 | bac06a8b96a3 |
14 | 5350aac9bd4c |
15 | 26bead4246a0 |
hex | 134cac6da8b0 |
21220031310000 has 200 divisors, whose sum is σ = 68581104759024. Its totient is φ = 5652065280000.
The previous prime is 21220031309989. The next prime is 21220031310017. The reversal of 21220031310000 is 1313002212.
It is a tau number, because it is divible by the number of its divisors (200).
It is a super-2 number, since 2×212200313100002 (a number of 27 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (15).
It is an unprimeable number.
It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25297320 + ... + 26122680.
Almost surely, 221220031310000 is an apocalyptic number.
21220031310000 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 21220031310000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34290552379512).
21220031310000 is an abundant number, since it is smaller than the sum of its proper divisors (47361073449024).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21220031310000 is an equidigital number, since it uses as much as digits as its factorization.
21220031310000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 826249 (or 826228 counting only the distinct ones).
The product of its (nonzero) digits is 72, while the sum is 15.
Adding to 21220031310000 its reverse (1313002212), we get a palindrome (21221344312212).
The spelling of 21220031310000 in words is "twenty-one trillion, two hundred twenty billion, thirty-one million, three hundred ten thousand".
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