Base | Representation |
---|---|
bin | 10001100111110101110… |
… | …101000000000100100101 |
3 | 11021202211101012021000112 |
4 | 101213311311000010211 |
5 | 124320122042401041 |
6 | 2324155205422405 |
7 | 153330650124110 |
oct | 21476565000445 |
9 | 4252741167015 |
10 | 1211010122021 |
11 | 42764a708797 |
12 | 176850a0aa05 |
13 | 8a2756475cb |
14 | 428828b1577 |
15 | 2177b5c8deb |
hex | 119f5d40125 |
1211010122021 has 16 divisors (see below), whose sum is σ = 1391709972480. Its totient is φ = 1032238408320.
The previous prime is 1211010122009. The next prime is 1211010122149. The reversal of 1211010122021 is 1202210101121.
It is not a de Polignac number, because 1211010122021 - 210 = 1211010120997 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 1211010121987 and 1211010122005.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1211010122921) 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, 4011065 + ... + 4302401.
It is an arithmetic number, because the mean of its divisors is an integer number (86981873280).
Almost surely, 21211010122021 is an apocalyptic number.
It is an amenable number.
1211010122021 is a deficient number, since it is larger than the sum of its proper divisors (180699850459).
1211010122021 is a wasteful number, since it uses less digits than its factorization.
1211010122021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 294644.
The product of its (nonzero) digits is 16, while the sum is 14.
Adding to 1211010122021 its reverse (1202210101121), we get a palindrome (2413220223142).
The spelling of 1211010122021 in words is "one trillion, two hundred eleven billion, ten million, one hundred twenty-two thousand, twenty-one".
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