Base | Representation |
---|---|
bin | 1001000110101100100111… |
… | …01111101000000001101001 |
3 | 2121220000112022020212200002 |
4 | 10203112103233220001221 |
5 | 10111012131223131441 |
6 | 110325400143352345 |
7 | 4134331002060356 |
oct | 443262357500151 |
9 | 77800468225602 |
10 | 20021321302121 |
11 | 6419aa3a13987 |
12 | 22b4323bb26b5 |
13 | b23005644639 |
14 | 4d3073c0b62d |
15 | 24ac01aedb9b |
hex | 123593be8069 |
20021321302121 has 16 divisors (see below), whose sum is σ = 20933551059840. Its totient is φ = 19112593315200.
The previous prime is 20021321302049. The next prime is 20021321302163. The reversal of 20021321302121 is 12120312312002.
It is a cyclic number.
It is not a de Polignac number, because 20021321302121 - 222 = 20021317107817 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 20021321302093 and 20021321302102.
It is not an unprimeable number, because it can be changed into a prime (20021321302921) 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, 37218971 + ... + 37753071.
It is an arithmetic number, because the mean of its divisors is an integer number (1308346941240).
Almost surely, 220021321302121 is an apocalyptic number.
It is an amenable number.
20021321302121 is a deficient number, since it is larger than the sum of its proper divisors (912229757719).
20021321302121 is a wasteful number, since it uses less digits than its factorization.
20021321302121 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 537376.
The product of its (nonzero) digits is 288, while the sum is 20.
Adding to 20021321302121 its reverse (12120312312002), we get a palindrome (32141633614123).
The spelling of 20021321302121 in words is "twenty trillion, twenty-one billion, three hundred twenty-one million, three hundred two thousand, one hundred twenty-one".
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