Base | Representation |
---|---|
bin | 1001001001100110011111… |
… | …01011111000010011111101 |
3 | 2122020120002211112222101120 |
4 | 10210303033223320103331 |
5 | 10114131013431413041 |
6 | 110443302203301153 |
7 | 4144462615161255 |
oct | 444631753702375 |
9 | 78216084488346 |
10 | 20121111201021 |
11 | 6458351797a06 |
12 | 230b73351a7b9 |
13 | b2c5497711ac |
14 | 4d7c1cdba965 |
15 | 24d5e2686366 |
hex | 124ccfaf84fd |
20121111201021 has 16 divisors (see below), whose sum is σ = 27765818037888. Its totient is φ = 12951985075200.
The previous prime is 20121111201017. The next prime is 20121111201031. The reversal of 20121111201021 is 12010211112102.
It is a happy number.
It is not a de Polignac number, because 20121111201021 - 22 = 20121111201017 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (20121111201031) 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, 843216265 + ... + 843240126.
It is an arithmetic number, because the mean of its divisors is an integer number (1735363627368).
Almost surely, 220121111201021 is an apocalyptic number.
It is an amenable number.
20121111201021 is a deficient number, since it is larger than the sum of its proper divisors (7644706836867).
20121111201021 is a wasteful number, since it uses less digits than its factorization.
20121111201021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1686456532.
The product of its (nonzero) digits is 16, while the sum is 15.
Adding to 20121111201021 its reverse (12010211112102), we get a palindrome (32131322313123).
The spelling of 20121111201021 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, two hundred one thousand, twenty-one".
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