| Base | Representation |
|---|---|
| bin | 111000011111101001… |
| … | …1011000100001110100 |
| 3 | 102121011002002222021220 |
| 4 | 1300333103120201310 |
| 5 | 3441431202130400 |
| 6 | 131422324510340 |
| 7 | 11523310406442 |
| oct | 1607723304164 |
| 9 | 377132088256 |
| 10 | 121321130100 |
| 11 | 474a7684785 |
| 12 | 1b61a24b3b0 |
| 13 | b595b0cc61 |
| 14 | 5c2c9a7b92 |
| 15 | 3250e6b7a0 |
| hex | 1c3f4d8874 |
121321130100 has 144 divisors (see below), whose sum is σ = 356458310208. Its totient is φ = 31854735360.
The previous prime is 121321130093. The next prime is 121321130123. The reversal of 121321130100 is 1031123121.
It is a happy number.
It is a super-2 number, since 2×1213211301002 (a number of 23 digits) contains 22 as substring.
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 121321130100.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5722119 + ... + 5743281.
It is an arithmetic number, because the mean of its divisors is an integer number (2475404932).
Almost surely, 2121321130100 is an apocalyptic number.
121321130100 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 121321130100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178229155104).
121321130100 is an abundant number, since it is smaller than the sum of its proper divisors (235137180108).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
121321130100 is a wasteful number, since it uses less digits than its factorization.
121321130100 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 21474 (or 21467 counting only the distinct ones).
The product of its (nonzero) digits is 36, while the sum is 15.
Adding to 121321130100 its reverse (1031123121), we get a palindrome (122352253221).
The spelling of 121321130100 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred thirty thousand, one hundred".
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