Base | Representation |
---|---|
bin | 111100110111001… |
… | …100001111010000 |
3 | 2122011101022020212 |
4 | 330313030033100 |
5 | 4042400213013 |
6 | 245153423252 |
7 | 34206133604 |
oct | 7467141720 |
9 | 2564338225 |
10 | 1021101008 |
11 | 484426334 |
12 | 245b6ab28 |
13 | 1337177a5 |
14 | 99881504 |
15 | 5e99d6a8 |
hex | 3cdcc3d0 |
1021101008 has 20 divisors (see below), whose sum is σ = 2064400608. Its totient is φ = 488352480.
The previous prime is 1021101001. The next prime is 1021101017. The reversal of 1021101008 is 8001011201.
It is a junction number, because it is equal to n+sod(n) for n = 1021100983 and 1021101001.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1021101001) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1386998 + ... + 1387733.
Almost surely, 21021101008 is an apocalyptic number.
It is an amenable number.
1021101008 is an abundant number, since it is smaller than the sum of its proper divisors (1043299600).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1021101008 is a wasteful number, since it uses less digits than its factorization.
1021101008 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2774762 (or 2774756 counting only the distinct ones).
The product of its (nonzero) digits is 16, while the sum is 14.
The square root of 1021101008 is about 31954.6711452332. The cubic root of 1021101008 is about 1006.9847687502.
Adding to 1021101008 its reverse (8001011201), we get a palindrome (9022112209).
The spelling of 1021101008 in words is "one billion, twenty-one million, one hundred one thousand, eight".
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