Base | Representation |
---|---|
bin | 1110011011010… |
… | …10001010101101 |
3 | 22102201111202000 |
4 | 13031222022231 |
5 | 221440133401 |
6 | 20001522513 |
7 | 2666443125 |
oct | 715521255 |
9 | 272644660 |
10 | 121021101 |
11 | 62349a43 |
12 | 34643439 |
13 | 1c0c3926 |
14 | 12103c85 |
15 | a958186 |
hex | 736a2ad |
121021101 has 32 divisors (see below), whose sum is σ = 190667520. Its totient is φ = 75696192.
The previous prime is 121021097. The next prime is 121021111. The reversal of 121021101 is 101120121.
It is a happy number.
It is not a de Polignac number, because 121021101 - 22 = 121021097 is a prime.
It is a super-2 number, since 2×1210211012 = 29292213774504402, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (121021111) 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, 31075 + ... + 34751.
It is an arithmetic number, because the mean of its divisors is an integer number (5958360).
Almost surely, 2121021101 is an apocalyptic number.
It is an amenable number.
121021101 is a deficient number, since it is larger than the sum of its proper divisors (69646419).
121021101 is a wasteful number, since it uses less digits than its factorization.
121021101 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3762 (or 3756 counting only the distinct ones).
The product of its (nonzero) digits is 4, while the sum is 9.
The square root of 121021101 is about 11000.9590945517. The cubic root of 121021101 is about 494.6374940012.
Adding to 121021101 its reverse (101120121), we get a palindrome (222141222).
It can be divided in two parts, 12102 and 1101, that added together give a triangular number (13203 = T162).
The spelling of 121021101 in words is "one hundred twenty-one million, twenty-one thousand, one hundred one".
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