21134213344444 has 24 divisors (see below), whose sum is σ = 37714881527568. Its totient is φ = 10358873441280.

The previous prime is 21134213344441. The next prime is 21134213344579. The reversal of 21134213344444 is 44444331243112.

It is a junction number, because it is equal to n+sod(n) for n = 21134213344397 and 21134213344406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134213344441) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 42317797 + ... + 42814300.

It is an arithmetic number, because the mean of its divisors is an integer number (1571453396982).

Almost surely, 2^{21134213344444} is an apocalyptic number.

It is an amenable number.

21134213344444 is a deficient number, since it is larger than the sum of its proper divisors (16580668183124).

21134213344444 is a wasteful number, since it uses less digits than its factorization.

21134213344444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85133325 (or 85133323 counting only the distinct ones).

The product of its digits is 442368, while the sum is 40.

Adding to 21134213344444 its reverse (44444331243112), we get a palindrome (65578544587556).

The spelling of 21134213344444 in words is "twenty-one trillion, one hundred thirty-four billion, two hundred thirteen million, three hundred forty-four thousand, four hundred forty-four".