| Base | Representation |
|---|---|
| bin | 1100001110101011110… |
| … | …0101010001001010101 |
| 3 | 202002022020121000012200 |
| 4 | 3003222330222021111 |
| 5 | 11420241122400041 |
| 6 | 240304012235113 |
| 7 | 21115323143205 |
| oct | 3035274521125 |
| 9 | 662266530180 |
| 10 | 210100200021 |
| 11 | 811150a3a48 |
| 12 | 3487616ba99 |
| 13 | 16a739c01aa |
| 14 | a251688405 |
| 15 | 56ea0261b6 |
| hex | 30eaf2a255 |
210100200021 has 6 divisors (see below), whose sum is σ = 303478066710. Its totient is φ = 140066800008.
The previous prime is 210100200019. The next prime is 210100200029. The reversal of 210100200021 is 120002001012.
210100200021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It can be written as a sum of positive squares in only one way, i.e., 182615202225 + 27484997796 = 427335^2 + 165786^2 .
It is not a de Polignac number, because 210100200021 - 21 = 210100200019 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 23344466669 = 210100200021 / (2 + 1 + 0 + 1 + 0 + 0 + 2 + 0 + 0 + 0 + 2 + 1).
It is a junction number, because it is equal to n+sod(n) for n = 210100199976 and 210100200012.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (210100200029) 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 5 ways as a sum of consecutive naturals, for example, 11672233326 + ... + 11672233343.
It is an arithmetic number, because the mean of its divisors is an integer number (50579677785).
Almost surely, 2210100200021 is an apocalyptic number.
It is an amenable number.
210100200021 is a deficient number, since it is larger than the sum of its proper divisors (93377866689).
210100200021 is a wasteful number, since it uses less digits than its factorization.
210100200021 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 23344466675 (or 23344466672 counting only the distinct ones).
The product of its (nonzero) digits is 8, while the sum is 9.
Adding to 210100200021 its reverse (120002001012), we get a palindrome (330102201033).
The spelling of 210100200021 in words is "two hundred ten billion, one hundred million, two hundred thousand, twenty-one".
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