21234201344 has 36 divisors (see below), whose sum is σ = 42443189880. Its totient is φ = 10602639360.

The previous prime is 21234201343. The next prime is 21234201349. The reversal of 21234201344 is 44310243212.

It is not an unprimeable number, because it can be changed into a prime (21234201341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133064 + ... + 245304.

Almost surely, 2^21234201344 is an apocalyptic number.

It is an amenable number.

21234201344 is a deficient number, since it is larger than the sum of its proper divisors (21208988536).

21234201344 is an equidigital number, since it uses as much as digits as its factorization.

21234201344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112996 (or 112982 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21234201344 its reverse (44310243212), we get a palindrome (65544444556).

The spelling of 21234201344 in words is "twenty-one billion, two hundred thirty-four million, two hundred one thousand, three hundred forty-four".