| Base | Representation |
|---|---|
| bin | 11011100011101100010100… |
| … | …001001010001011110011100 |
| 3 | 120220010121102210022101100010 |
| 4 | 123203230110021101132130 |
| 5 | 111341220120121213040 |
| 6 | 1105434304240203220 |
| 7 | 34346261324556600 |
| oct | 3343542411213634 |
| 9 | 526117383271303 |
| 10 | 121200020101020 |
| 11 | 3568870473a513 |
| 12 | 11715461609510 |
| 13 | 5282160c31a73 |
| 14 | 21d018010b500 |
| 15 | e02a55eb1e80 |
| hex | 6e3b1425179c |
121200020101020 has 288 divisors, whose sum is σ = 398738265601536. Its totient is φ = 27424178880000.
The previous prime is 121200020101009. The next prime is 121200020101021. The reversal of 121200020101020 is 20101020002121.
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 = 121200020100987 and 121200020101005.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (121200020101021) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2073502795 + ... + 2073561245.
It is an arithmetic number, because the mean of its divisors is an integer number (1384507866672).
Almost surely, 2121200020101020 is an apocalyptic number.
121200020101020 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 121200020101020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199369132800768).
121200020101020 is an abundant number, since it is smaller than the sum of its proper divisors (277538245500516).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
121200020101020 is a wasteful number, since it uses less digits than its factorization.
121200020101020 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 65561 (or 65552 counting only the distinct ones).
The product of its (nonzero) digits is 16, while the sum is 12.
Adding to 121200020101020 its reverse (20101020002121), we get a palindrome (141301040103141).
The spelling of 121200020101020 in words is "one hundred twenty-one trillion, two hundred billion, twenty million, one hundred one thousand, twenty".
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