| Base | Representation |
|---|---|
| bin | 1100010011100110101… |
| … | …1001001100001111010 |
| 3 | 202012201021221002221100 |
| 4 | 3010321223021201322 |
| 5 | 11430442234310132 |
| 6 | 241043033552230 |
| 7 | 21163131635244 |
| oct | 3047153114172 |
| 9 | 665637832840 |
| 10 | 211421010042 |
| 11 | 81732715080 |
| 12 | 34b84575676 |
| 13 | 16c24533198 |
| 14 | a338c65094 |
| 15 | 5775e7737c |
| hex | 3139ac987a |
211421010042 has 96 divisors (see below), whose sum is σ = 516031326720. Its totient is φ = 61977600000.
The previous prime is 211421010037. The next prime is 211421010049. The reversal of 211421010042 is 240010124112.
211421010042 is digitally balanced in base 2, 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 junction number, because it is equal to n+sod(n) for n = 211421009997 and 211421010024.
It is not an unprimeable number, because it can be changed into a prime (211421010049) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24553834 + ... + 24562442.
It is an arithmetic number, because the mean of its divisors is an integer number (5375326320).
Almost surely, 2211421010042 is an apocalyptic number.
211421010042 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 211421010042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258015663360).
211421010042 is an abundant number, since it is smaller than the sum of its proper divisors (304610316678).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
211421010042 is a wasteful number, since it uses less digits than its factorization.
211421010042 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 12660 (or 12657 counting only the distinct ones).
The product of its (nonzero) digits is 128, while the sum is 18.
Adding to 211421010042 its reverse (240010124112), we get a palindrome (451431134154).
The spelling of 211421010042 in words is "two hundred eleven billion, four hundred twenty-one million, ten thousand, forty-two".
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