| Base | Representation |
|---|---|
| bin | 1011110000111010110… |
| … | …0111011010100000100 |
| 3 | 201022200101211221122012 |
| 4 | 2330032230323110010 |
| 5 | 11302410142334340 |
| 6 | 232503105153352 |
| 7 | 20413322453630 |
| oct | 2741654732404 |
| 9 | 638611757565 |
| 10 | 202110121220 |
| 11 | 78794992537 |
| 12 | 3320632b858 |
| 13 | 1609c541b07 |
| 14 | 9ad4443dc0 |
| 15 | 53cd83a565 |
| hex | 2f0eb3b504 |
202110121220 has 144 divisors (see below), whose sum is σ = 516436677120. Its totient is φ = 65071835136.
The previous prime is 202110121217. The next prime is 202110121223. The reversal of 202110121220 is 22121011202.
202110121220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is an interprime number because it is at equal distance from previous prime (202110121217) and next prime (202110121223).
It is a Harshad number since it is a multiple of its sum of digits (14).
It is a junction number, because it is equal to n+sod(n) for n = 202110121195 and 202110121204.
It is not an unprimeable number, because it can be changed into a prime (202110121223) 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, 18727586 + ... + 18738374.
Almost surely, 2202110121220 is an apocalyptic number.
202110121220 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 202110121220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258218338560).
202110121220 is an abundant number, since it is smaller than the sum of its proper divisors (314326555900).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
202110121220 is a wasteful number, since it uses less digits than its factorization.
202110121220 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 11302 (or 11283 counting only the distinct ones).
The product of its (nonzero) digits is 32, while the sum is 14.
Adding to 202110121220 its reverse (22121011202), we get a palindrome (224231132422).
The spelling of 202110121220 in words is "two hundred two billion, one hundred ten million, one hundred twenty-one thousand, two hundred twenty".
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