21344224312 has 16 divisors (see below), whose sum is σ = 40102605360. Its totient is φ = 10650196224.

The previous prime is 21344224309. The next prime is 21344224327. The reversal of 21344224312 is 21342244312.

It is a super-3 number, since 3×21344224312³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2735353 + ... + 2743144.

It is an arithmetic number, because the mean of its divisors is an integer number (2506412835).

Almost surely, 2^21344224312 is an apocalyptic number.

It is an amenable number.

21344224312 is a deficient number, since it is larger than the sum of its proper divisors (18758381048).

21344224312 is a wasteful number, since it uses less digits than its factorization.

21344224312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5478990 (or 5478986 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

Adding to 21344224312 its reverse (21342244312), we get a palindrome (42686468624).

The spelling of 21344224312 in words is "twenty-one billion, three hundred forty-four million, two hundred twenty-four thousand, three hundred twelve".