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21213543315105 = 325471412073669
BaseRepresentation
bin1001101001011001010011…
…01101101011011010100001
32210002222212022022022022100
410310230221231223122201
510240030314042040410
6113041211155001013
74316425244012421
oct464545155533241
983088768268270
1021213543315105
116839682190229
1224673b0899169
13bab5756acc5b
14534a53340481
1526bc2da458c0
hex134b29b6b6a1

21213543315105 has 12 divisors (see below), whose sum is σ = 36770141746260. Its totient is φ = 11313889768032.

The previous prime is 21213543315073. The next prime is 21213543315143. The reversal of 21213543315105 is 50151334531212.

It is a happy number.

21213543315105 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 3 + 543 + 3 + 1 + 5 + 105 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6737466409569 + 14476076905536 = 2595663^2 + 3804744^2 .

It is not a de Polignac number, because 21213543315105 - 25 = 21213543315073 is a prime.

It is a super-2 number, since 2×212135433151052 (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21213543315105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235706036790 + ... + 235706036879.

It is an arithmetic number, because the mean of its divisors is an integer number (3064178478855).

Almost surely, 221213543315105 is an apocalyptic number.

It is an amenable number.

21213543315105 is a deficient number, since it is larger than the sum of its proper divisors (15556598431155).

21213543315105 is a wasteful number, since it uses less digits than its factorization.

21213543315105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471412073680 (or 471412073677 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

Adding to 21213543315105 its reverse (50151334531212), we get a palindrome (71364877846317).

The spelling of 21213543315105 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-three million, three hundred fifteen thousand, one hundred five".

Divisors: 1 3 5 9 15 45 471412073669 1414236221007 2357060368345 4242708663021 7071181105035 21213543315105