| Base | Representation |
|---|---|
| bin | 11011100010100010111010… |
| … | …001110001010011101001100 |
| 3 | 120212212001222211012010102102 |
| 4 | 123202202322032022131030 |
| 5 | 111333422210204202340 |
| 6 | 1105334151223214232 |
| 7 | 34340501204135441 |
| oct | 3342427216123514 |
| 9 | 525761884163372 |
| 10 | 121121202022220 |
| 11 | 35658238a11314 |
| 12 | 117021255a7378 |
| 13 | 52778ac93160a |
| 14 | 21ca4243179c8 |
| 15 | e0099165c215 |
| hex | 6e28ba38a74c |
121121202022220 has 192 divisors, whose sum is σ = 267848723237760. Its totient is φ = 45942521856000.
The previous prime is 121121202022181. The next prime is 121121202022229. The reversal of 121121202022220 is 22220202121121.
It is a Harshad number since it is a multiple of its sum of digits (20).
It is a junction number, because it is equal to n+sod(n) for n = 121121202022192 and 121121202022201.
It is not an unprimeable number, because it can be changed into a prime (121121202022229) 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 63 ways as a sum of consecutive naturals, for example, 19852677170 + ... + 19852683270.
It is an arithmetic number, because the mean of its divisors is an integer number (1395045433530).
Almost surely, 2121121202022220 is an apocalyptic number.
121121202022220 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 121121202022220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133924361618880).
121121202022220 is an abundant number, since it is smaller than the sum of its proper divisors (146727521215540).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
121121202022220 is a wasteful number, since it uses less digits than its factorization.
121121202022220 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 7644 (or 7642 counting only the distinct ones).
The product of its (nonzero) digits is 256, while the sum is 20.
Adding to 121121202022220 its reverse (22220202121121), we get a palindrome (143341404143341).
The spelling of 121121202022220 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred two million, twenty-two thousand, two hundred twenty".
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