21232144344042 has 64 divisors (see below), whose sum is σ = 47268978969600. Its totient is φ = 7064422328880.

The previous prime is 21232144344013. The next prime is 21232144344067. The reversal of 21232144344042 is 24044344123212.

21232144344042 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 214 + 4 + 34 + 404 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21232144343988 and 21232144344006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124678509 + ... + 124848687.

It is an arithmetic number, because the mean of its divisors is an integer number (738577796400).

Almost surely, 2^{21232144344042} is an apocalyptic number.

21232144344042 is an abundant number, since it is smaller than the sum of its proper divisors (26036834625558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21232144344042 is a wasteful number, since it uses less digits than its factorization.

21232144344042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174408 (or 174402 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 36.

Adding to 21232144344042 its reverse (24044344123212), we get a palindrome (45276488467254).

The spelling of 21232144344042 in words is "twenty-one trillion, two hundred thirty-two billion, one hundred forty-four million, three hundred forty-four thousand, forty-two".