21443511342411 has 10 divisors (see below), whose sum is σ = 32032899659772. Its totient is φ = 14295674228220.

The previous prime is 21443511342401. The next prime is 21443511342419. The reversal of 21443511342411 is 11424311534412.

21443511342411 is a `hidden beast` number, since 2 + 1 + 443 + 51 + 134 + 24 + 11 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-21443511342411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21443511342419) 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 9 ways as a sum of consecutive naturals, for example, 132367353885 + ... + 132367354046.

Almost surely, 2^{21443511342411} is an apocalyptic number.

21443511342411 is a deficient number, since it is larger than the sum of its proper divisors (10589388317361).

21443511342411 is an equidigital number, since it uses as much as digits as its factorization.

21443511342411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264734707943 (or 264734707934 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

Adding to 21443511342411 its reverse (11424311534412), we get a palindrome (32867822876823).

The spelling of 21443511342411 in words is "twenty-one trillion, four hundred forty-three billion, five hundred eleven million, three hundred forty-two thousand, four hundred eleven".