| Base | Representation |
|---|---|
| bin | 10011110000100111… |
| … | …010010101011101000 |
| 3 | 2000202121222002110200 |
| 4 | 103300213102223220 |
| 5 | 321422433414120 |
| 6 | 13425151312200 |
| 7 | 1350524661414 |
| oct | 236047225350 |
| 9 | 60677862420 |
| 10 | 21216701160 |
| 11 | 8aa8302676 |
| 12 | 414151b660 |
| 13 | 2001798b55 |
| 14 | 1053b21d44 |
| 15 | 8429a4e90 |
| hex | 4f09d2ae8 |
21216701160 has 96 divisors (see below), whose sum is σ = 69152265000. Its totient is φ = 5641542144.
The previous prime is 21216701159. The next prime is 21216701161. The reversal of 21216701160 is 6110761212.
It is a happy number.
It is an interprime number because it is at equal distance from previous prime (21216701159) and next prime (21216701161).
It can be written as a sum of positive squares in 4 ways, for example, as 15098019876 + 6118681284 = 122874^2 + 78222^2 .
It is a super-2 number, since 2×212167011602 (a number of 21 digits) contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (21216701161) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41206 + ... + 210074.
Almost surely, 221216701160 is an apocalyptic number.
21216701160 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 21216701160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34576132500).
21216701160 is an abundant number, since it is smaller than the sum of its proper divisors (47935563840).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21216701160 is a wasteful number, since it uses less digits than its factorization.
21216701160 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 169235 (or 169228 counting only the distinct ones).
The product of its (nonzero) digits is 1008, while the sum is 27.
It can be divided in two parts, 2121670 and 1160, that added together give a triangular number (2122830 = T2060).
The spelling of 21216701160 in words is "twenty-one billion, two hundred sixteen million, seven hundred one thousand, one hundred sixty".
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