Base | Representation |
---|---|
bin | 10001101000110111111… |
… | …111100111001110111001 |
3 | 11021212200202000001220020 |
4 | 101220313333213032321 |
5 | 124324410232400441 |
6 | 2324501302321053 |
7 | 153400316463315 |
oct | 21506777471671 |
9 | 4255622001806 |
10 | 1212120200121 |
11 | 42806a286906 |
12 | 176b00729189 |
13 | 8a3c161655c |
14 | 4294a0b4b45 |
15 | 217e3ca0e66 |
hex | 11a37fe73b9 |
1212120200121 has 16 divisors (see below), whose sum is σ = 1619601532800. Its totient is φ = 806359753728.
The previous prime is 1212120200117. The next prime is 1212120200129. The reversal of 1212120200121 is 1210020212121.
It is not a de Polignac number, because 1212120200121 - 22 = 1212120200117 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 1212120200121.
It is not an unprimeable number, because it can be changed into a prime (1212120200129) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27545625 + ... + 27589593.
It is an arithmetic number, because the mean of its divisors is an integer number (101225095800).
Almost surely, 21212120200121 is an apocalyptic number.
It is an amenable number.
1212120200121 is a deficient number, since it is larger than the sum of its proper divisors (407481332679).
1212120200121 is a wasteful number, since it uses less digits than its factorization.
1212120200121 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 63328.
The product of its (nonzero) digits is 32, while the sum is 15.
Adding to 1212120200121 its reverse (1210020212121), we get a palindrome (2422140412242).
The spelling of 1212120200121 in words is "one trillion, two hundred twelve billion, one hundred twenty million, two hundred thousand, one hundred twenty-one".
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