| Base | Representation |
|---|---|
| bin | 111000110100100001… |
| … | …0000001001101010000 |
| 3 | 102122221212110021201220 |
| 4 | 1301221002001031100 |
| 5 | 3444344413034300 |
| 6 | 132020014125040 |
| 7 | 11546541160404 |
| oct | 1615102011520 |
| 9 | 378855407656 |
| 10 | 122021221200 |
| 11 | 4782688656a |
| 12 | 1b7947b0780 |
| 13 | b677b81948 |
| 14 | 5c97967104 |
| 15 | 329265ada0 |
| hex | 1c69081350 |
122021221200 has 120 divisors (see below), whose sum is σ = 393058994400. Its totient is φ = 32357153280.
The previous prime is 122021221177. The next prime is 122021221207. The reversal of 122021221200 is 2122120221.
It is a tau number, because it is divible by the number of its divisors (120).
It is a Harshad number since it is a multiple of its sum of digits (15).
It is a self number, because there is not a number n which added to its sum of digits gives 122021221200.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (122021221207) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69235 + ... + 498834.
It is an arithmetic number, because the mean of its divisors is an integer number (3275491620).
Almost surely, 2122021221200 is an apocalyptic number.
122021221200 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 122021221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196529497200).
122021221200 is an abundant number, since it is smaller than the sum of its proper divisors (271037773200).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
122021221200 is a wasteful number, since it uses less digits than its factorization.
122021221200 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 568269 (or 568258 counting only the distinct ones).
The product of its (nonzero) digits is 64, while the sum is 15.
Adding to 122021221200 its reverse (2122120221), we get a palindrome (124143341421).
The spelling of 122021221200 in words is "one hundred twenty-two billion, twenty-one million, two hundred twenty-one thousand, two hundred".
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