Base | Representation |
---|---|
bin | 1001001011111011100001… |
… | …01001100000011011100101 |
3 | 2122112012121212100002102222 |
4 | 10211331300221200123211 |
5 | 10121433344001401041 |
6 | 110544133353442125 |
7 | 4153324420243130 |
oct | 445756051403345 |
9 | 78465555302388 |
10 | 20201121122021 |
11 | 648927a25a864 |
12 | 2323142710345 |
13 | b36c5a96a908 |
14 | 4dba4d1b9217 |
15 | 25072696474b |
hex | 125f70a606e5 |
20201121122021 has 64 divisors (see below), whose sum is σ = 24571330560000. Its totient is φ = 16223516568000.
The previous prime is 20201121122003. The next prime is 20201121122027. The reversal of 20201121122021 is 12022112110202.
It is not a de Polignac number, because 20201121122021 - 230 = 20200047380197 is a prime.
It is a super-2 number, since 2×202011211220212 (a number of 27 digits) contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (20201121122027) by changing a digit.
It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2928119630 + ... + 2928126528.
It is an arithmetic number, because the mean of its divisors is an integer number (383927040000).
Almost surely, 220201121122021 is an apocalyptic number.
It is an amenable number.
20201121122021 is a deficient number, since it is larger than the sum of its proper divisors (4370209437979).
20201121122021 is a wasteful number, since it uses less digits than its factorization.
20201121122021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 7782.
The product of its (nonzero) digits is 64, while the sum is 17.
Adding to 20201121122021 its reverse (12022112110202), we get a palindrome (32223233232223).
The spelling of 20201121122021 in words is "twenty trillion, two hundred one billion, one hundred twenty-one million, one hundred twenty-two thousand, twenty-one".
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