Base | Representation |
---|---|
bin | 10010101000001110… |
… | …01111111111000101 |
3 | 221210222212121011002 |
4 | 21110013033333011 |
5 | 130440241334341 |
6 | 4332222423045 |
7 | 502560061550 |
oct | 112407177705 |
9 | 27728777132 |
10 | 10001121221 |
11 | 4272410443 |
12 | 1b31431a85 |
13 | c34cc0910 |
14 | 6ac375697 |
15 | 3d803029b |
hex | 2541cffc5 |
10001121221 has 16 divisors (see below), whose sum is σ = 12733526400. Its totient is φ = 7640111808.
The previous prime is 10001121197. The next prime is 10001121223. The reversal of 10001121221 is 12212110001.
It is not a de Polignac number, because 10001121221 - 26 = 10001121157 is a prime.
It is a Curzon number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (10001121223) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1892231 + ... + 1897508.
It is an arithmetic number, because the mean of its divisors is an integer number (795845400).
Almost surely, 210001121221 is an apocalyptic number.
It is an amenable number.
10001121221 is a deficient number, since it is larger than the sum of its proper divisors (2732405179).
10001121221 is a wasteful number, since it uses less digits than its factorization.
10001121221 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3789788.
The product of its (nonzero) digits is 8, while the sum is 11.
Adding to 10001121221 its reverse (12212110001), we get a palindrome (22213231222).
The spelling of 10001121221 in words is "ten billion, one million, one hundred twenty-one thousand, two hundred twenty-one".
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