| Base | Representation |
|---|---|
| bin | 1111101100001111… |
| … | …1101111011101000 |
| 3 | 101212112211221012100 |
| 4 | 3323003331323220 |
| 5 | 32111300340240 |
| 6 | 1533544213400 |
| 7 | 206244304041 |
| oct | 37303757350 |
| 9 | 11775757170 |
| 10 | 4212121320 |
| 11 | 18716a6100 |
| 12 | 99676a260 |
| 13 | 521860ca4 |
| 14 | 2bd5ad8c8 |
| 15 | 199bc5e30 |
| hex | fb0fdee8 |
4212121320 has 144 divisors (see below), whose sum is σ = 15047175780. Its totient is φ = 1021109760.
The previous prime is 4212121313. The next prime is 4212121321. The reversal of 4212121320 is 231212124.
It is a happy number.
4212121320 is a `hidden beast` number, since 421 + 212 + 1 + 32 + 0 = 666.
It can be written as a sum of positive squares in 2 ways, for example, as 4039619364 + 172501956 = 63558^2 + 13134^2 .
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a junction number, because it is equal to n+sod(n) for n = 4212121293 and 4212121302.
It is not an unprimeable number, because it can be changed into a prime (4212121321) by changing a digit.
It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4789 + ... + 91908.
Almost surely, 24212121320 is an apocalyptic number.
4212121320 is a gapful number since it is divisible by the number (40) 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 4212121320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7523587890).
4212121320 is an abundant number, since it is smaller than the sum of its proper divisors (10835054460).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
4212121320 is a wasteful number, since it uses less digits than its factorization.
4212121320 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 96736 (or 96718 counting only the distinct ones).
The product of its (nonzero) digits is 192, while the sum is 18.
The square root of 4212121320 is about 64900.8576214521. The cubic root of 4212121320 is about 1614.9792889701.
Adding to 4212121320 its reverse (231212124), we get a palindrome (4443333444).
The spelling of 4212121320 in words is "four billion, two hundred twelve million, one hundred twenty-one thousand, three hundred twenty".
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