21334212444 has 12 divisors (see below), whose sum is σ = 49779829064. Its totient is φ = 7111404144.

The previous prime is 21334212443. The next prime is 21334212461. The reversal of 21334212444 is 44421243312.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21334212443) 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 3 ways as a sum of consecutive naturals, for example, 888925507 + ... + 888925530.

Almost surely, 2^21334212444 is an apocalyptic number.

It is an amenable number.

21334212444 is an abundant number, since it is smaller than the sum of its proper divisors (28445616620).

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

21334212444 is a wasteful number, since it uses less digits than its factorization.

21334212444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777851044 (or 1777851042 counting only the distinct ones).

The product of its digits is 18432, while the sum is 30.

Adding to 21334212444 its reverse (44421243312), we get a palindrome (65755455756).

The spelling of 21334212444 in words is "twenty-one billion, three hundred thirty-four million, two hundred twelve thousand, four hundred forty-four".