Base | Representation |
---|---|
bin | 1011110000111101011… |
… | …1001100101000101100 |
3 | 201022201011200220220121 |
4 | 2330033113030220230 |
5 | 11302421011432340 |
6 | 232504142454324 |
7 | 20413515605020 |
oct | 2741727145054 |
9 | 638634626817 |
10 | 202121202220 |
11 | 787a0170893 |
12 | 33209b943a4 |
13 | 160a1921712 |
14 | 9ad5aca380 |
15 | 53ce7c894a |
hex | 2f0f5cca2c |
202121202220 has 96 divisors (see below), whose sum is σ = 497175920640. Its totient is φ = 67573992960.
The previous prime is 202121202197. The next prime is 202121202259. The reversal of 202121202220 is 22202121202.
It is a junction number, because it is equal to n+sod(n) for n = 202121202194 and 202121202203.
It is an unprimeable number.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12843997 + ... + 12859723.
It is an arithmetic number, because the mean of its divisors is an integer number (5178915840).
Almost surely, 2202121202220 is an apocalyptic number.
202121202220 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 202121202220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248587960320).
202121202220 is an abundant number, since it is smaller than the sum of its proper divisors (295054718420).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
202121202220 is a wasteful number, since it uses less digits than its factorization.
202121202220 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 18023 (or 18021 counting only the distinct ones).
The product of its (nonzero) digits is 128, while the sum is 16.
Adding to 202121202220 its reverse (22202121202), we get a palindrome (224323323422).
The spelling of 202121202220 in words is "two hundred two billion, one hundred twenty-one million, two hundred two thousand, two hundred twenty".
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