Base | Representation |
---|---|
bin | 10011100100111100… |
… | …110000001001110111 |
3 | 2000020222201110101002 |
4 | 103210330300021313 |
5 | 321022334002221 |
6 | 13353520553515 |
7 | 1342630361123 |
oct | 234474601167 |
9 | 60228643332 |
10 | 21021000311 |
11 | 8a07896733 |
12 | 40a7a8289b |
13 | 1ca008862c |
14 | 1035b3c583 |
15 | 8306e980b |
hex | 4e4f30277 |
21021000311 has 8 divisors (see below), whose sum is σ = 21198843600. Its totient is φ = 20843647488.
The previous prime is 21021000307. The next prime is 21021000313. The reversal of 21021000311 is 11300012012.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 21021000311 - 22 = 21021000307 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 21021000292 and 21021000301.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (21021000313) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36281 + ... + 208226.
It is an arithmetic number, because the mean of its divisors is an integer number (2649855450).
Almost surely, 221021000311 is an apocalyptic number.
21021000311 is a deficient number, since it is larger than the sum of its proper divisors (177843289).
21021000311 is a wasteful number, since it uses less digits than its factorization.
21021000311 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 245233.
The product of its (nonzero) digits is 12, while the sum is 11.
Adding to 21021000311 its reverse (11300012012), we get a palindrome (32321012323).
The spelling of 21021000311 in words is "twenty-one billion, twenty-one million, three hundred eleven", and thus it is an aban number.
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