| Base | Representation |
|---|---|
| bin | 10011110111011000… |
| … | …010011100011101110 |
| 3 | 2001001112120002120200 |
| 4 | 103313120103203232 |
| 5 | 322141013304402 |
| 6 | 13444324254330 |
| 7 | 1353403551132 |
| oct | 236730234356 |
| 9 | 61045502520 |
| 10 | 21330213102 |
| 11 | 90563928a0 |
| 12 | 41735413a6 |
| 13 | 201c160893 |
| 14 | 1064c2d3c2 |
| 15 | 84c92821c |
| hex | 4f76138ee |
21330213102 has 96 divisors (see below), whose sum is σ = 52265326464. Its totient is φ = 6230001600.
The previous prime is 21330213101. The next prime is 21330213119. The reversal of 21330213102 is 20131203312.
21330213102 is a `hidden beast` number, since 2 + 1 + 330 + 21 + 310 + 2 = 666.
21330213102 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (21330213101) by changing a digit.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 770277 + ... + 797487.
It is an arithmetic number, because the mean of its divisors is an integer number (544430484).
Almost surely, 221330213102 is an apocalyptic number.
21330213102 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 21330213102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26132663232).
21330213102 is an abundant number, since it is smaller than the sum of its proper divisors (30935113362).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21330213102 is a wasteful number, since it uses less digits than its factorization.
21330213102 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 27374 (or 27371 counting only the distinct ones).
The product of its (nonzero) digits is 216, while the sum is 18.
Adding to 21330213102 its reverse (20131203312), we get a palindrome (41461416414).
It can be divided in two parts, 21330 and 213102, that added together give a palindrome (234432).
The spelling of 21330213102 in words is "twenty-one billion, three hundred thirty million, two hundred thirteen thousand, one hundred two".
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