Base | Representation |
---|---|
bin | 1001100110001001110000… |
… | …11100000111011110100000 |
3 | 2202201100021002222102012012 |
4 | 10303010320130013132200 |
5 | 10231214121013020000 |
6 | 112514103004452052 |
7 | 4305402143563202 |
oct | 463047034073640 |
9 | 82640232872165 |
10 | 21102121220000 |
11 | 67a63a5330007 |
12 | 244989584a028 |
13 | ba0bc9699672 |
14 | 52d4c3336772 |
15 | 268dabb91735 |
hex | 1331387077a0 |
21102121220000 has 60 divisors (see below), whose sum is σ = 51914383568586. Its totient is φ = 8440848480000.
The previous prime is 21102121219939. The next prime is 21102121220009. The reversal of 21102121220000 is 2212120112.
It can be written as a sum of positive squares in 5 ways, for example, as 51679838224 + 21050441381776 = 227332^2 + 4588076^2 .
It is not an unprimeable number, because it can be changed into a prime (21102121220009) by changing a digit.
It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 527533031 + ... + 527573030.
Almost surely, 221102121220000 is an apocalyptic number.
21102121220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
21102121220000 is an abundant number, since it is smaller than the sum of its proper divisors (30812262348586).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21102121220000 is an equidigital number, since it uses as much as digits as its factorization.
21102121220000 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1055106091 (or 1055106068 counting only the distinct ones).
The product of its (nonzero) digits is 32, while the sum is 14.
Adding to 21102121220000 its reverse (2212120112), we get a palindrome (21104333340112).
The spelling of 21102121220000 in words is "twenty-one trillion, one hundred two billion, one hundred twenty-one million, two hundred twenty thousand".
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