Base | Representation |
---|---|
bin | 10110011001000010… |
… | …10001110000001011 |
3 | 1011000210000202011120 |
4 | 23030201101300023 |
5 | 144104412210443 |
6 | 5304504130323 |
7 | 603616412556 |
oct | 131441216013 |
9 | 34023022146 |
10 | 12021210123 |
11 | 51097290aa |
12 | 23b5a669a3 |
13 | 119767c9b0 |
14 | 82077d69d |
15 | 4a5560083 |
hex | 2cc851c0b |
12021210123 has 32 divisors (see below), whose sum is σ = 17874561600. Its totient is φ = 7135328256.
The previous prime is 12021210059. The next prime is 12021210167. The reversal of 12021210123 is 32101212021.
It is not a de Polignac number, because 12021210123 - 26 = 12021210059 is a prime.
It is not an unprimeable number, because it can be changed into a prime (12021210623) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1235863 + ... + 1245551.
It is an arithmetic number, because the mean of its divisors is an integer number (558580050).
Almost surely, 212021210123 is an apocalyptic number.
12021210123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.
12021210123 is a deficient number, since it is larger than the sum of its proper divisors (5853351477).
12021210123 is a wasteful number, since it uses less digits than its factorization.
12021210123 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 10831.
The product of its (nonzero) digits is 48, while the sum is 15.
Adding to 12021210123 its reverse (32101212021), we get a palindrome (44122422144).
The spelling of 12021210123 in words is "twelve billion, twenty-one million, two hundred ten thousand, one hundred twenty-three".
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