| Base | Representation |
|---|---|
| bin | 11011100011111111110111… |
| … | …110110010101010000011010 |
| 3 | 120220012121122022201110110200 |
| 4 | 123203333313312111100122 |
| 5 | 111342041122133211302 |
| 6 | 1105452100133323030 |
| 7 | 34350633612550653 |
| oct | 3343776766252032 |
| 9 | 526177568643420 |
| 10 | 121221020210202 |
| 11 | 35696600757350 |
| 12 | 11719542496476 |
| 13 | 5284129884483 |
| 14 | 21d11b316c52a |
| 15 | e0338493181c |
| hex | 6e3ff7d9541a |
121221020210202 has 144 divisors (see below), whose sum is σ = 299641850883648. Its totient is φ = 35122413870720.
The previous prime is 121221020210201. The next prime is 121221020210219. The reversal of 121221020210202 is 202012020122121.
It is a happy number.
121221020210202 is a `hidden beast` number, since 1 + 21 + 2 + 210 + 20 + 210 + 202 = 666.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is not an unprimeable number, because it can be changed into a prime (121221020210201) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (29) of ones.
It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 261938038 + ... + 262400414.
It is an arithmetic number, because the mean of its divisors is an integer number (2080846186692).
Almost surely, 2121221020210202 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 121221020210202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149820925441824).
121221020210202 is an abundant number, since it is smaller than the sum of its proper divisors (178420830673446).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
121221020210202 is a wasteful number, since it uses less digits than its factorization.
121221020210202 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 464945 (or 464919 counting only the distinct ones).
The product of its (nonzero) digits is 128, while the sum is 18.
Adding to 121221020210202 its reverse (202012020122121), we get a palindrome (323233040332323).
It can be divided in two parts, 1212210 and 20210202, that added together give a palindrome (21422412).
The spelling of 121221020210202 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred ten thousand, two hundred two".
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