Base | Representation |
---|---|
bin | 100100001000000… |
… | …1101101111001000 |
3 | 10010110222122200010 |
4 | 1020100031233020 |
5 | 4440311210440 |
6 | 320141511520 |
7 | 42016421202 |
oct | 11020155710 |
9 | 3113878603 |
10 | 1212210120 |
11 | 572296450 |
12 | 299b725a0 |
13 | 1641aacc4 |
14 | b6dcb772 |
15 | 7164d580 |
hex | 4840dbc8 |
1212210120 has 64 divisors (see below), whose sum is σ = 3967237440. Its totient is φ = 293868800.
The previous prime is 1212210091. The next prime is 1212210137. The reversal of 1212210120 is 210122121.
It is a Harshad number since it is a multiple of its sum of digits (12).
It is a junction number, because it is equal to n+sod(n) for n = 1212210096 and 1212210105.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 457851 + ... + 460490.
It is an arithmetic number, because the mean of its divisors is an integer number (61988085).
Almost surely, 21212210120 is an apocalyptic number.
1212210120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
1212210120 is an abundant number, since it is smaller than the sum of its proper divisors (2755027320).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1212210120 is a wasteful number, since it uses less digits than its factorization.
1212210120 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 918366 (or 918362 counting only the distinct ones).
The product of its (nonzero) digits is 16, while the sum is 12.
The square root of 1212210120 is about 34816.8080099253. The cubic root of 1212210120 is about 1066.2506324593.
Adding to 1212210120 its reverse (210122121), we get a palindrome (1422332241).
It can be divided in two parts, 12122101 and 20, that added together give a palindrome (12122121).
The spelling of 1212210120 in words is "one billion, two hundred twelve million, two hundred ten thousand, one hundred twenty".
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