| Base | Representation |
|---|---|
| bin | 1110011101011… |
| … | …11000010110100 |
| 3 | 22110020211201212 |
| 4 | 13032233002310 |
| 5 | 222023200340 |
| 6 | 20011540552 |
| 7 | 3002026463 |
| oct | 716570264 |
| 9 | 273224655 |
| 10 | 121303220 |
| 11 | 625219a5 |
| 12 | 3475a758 |
| 13 | 1c19216c |
| 14 | 121789da |
| 15 | a9b1a65 |
| hex | 73af0b4 |
121303220 has 72 divisors (see below), whose sum is σ = 274786344. Its totient is φ = 44957952.
The previous prime is 121303181. The next prime is 121303223. The reversal of 121303220 is 22303121.
It is a happy number.
It can be written as a sum of positive squares in 4 ways, for example, as 3189796 + 118113424 = 1786^2 + 10868^2 .
It is a junction number, because it is equal to n+sod(n) for n = 121303195 and 121303204.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (121303223) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 382502 + ... + 382818.
It is an arithmetic number, because the mean of its divisors is an integer number (3816477).
Almost surely, 2121303220 is an apocalyptic number.
121303220 is a gapful number since it is divisible by the number (10) 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 121303220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137393172).
121303220 is an abundant number, since it is smaller than the sum of its proper divisors (153483124).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
121303220 is a wasteful number, since it uses less digits than its factorization.
121303220 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 417 (or 396 counting only the distinct ones).
The product of its (nonzero) digits is 72, while the sum is 14.
The square root of 121303220 is about 11013.7741033671. The cubic root of 121303220 is about 495.0215546850.
Adding to 121303220 its reverse (22303121), we get a palindrome (143606341).
Subtracting from 121303220 its reverse (22303121), we obtain a palindrome (99000099).
The spelling of 121303220 in words is "one hundred twenty-one million, three hundred three thousand, two hundred twenty".
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