21244334312 has 8 divisors (see below), whose sum is σ = 39833126850. Its totient is φ = 10622167152.

The previous prime is 21244334299. The next prime is 21244334347. The reversal of 21244334312 is 21343344212.

It can be written as a sum of positive squares in only one way, i.e., 21075490276 + 168844036 = 145174^2 + 12994^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1327770887 + ... + 1327770902.

Almost surely, 2^21244334312 is an apocalyptic number.

It is an amenable number.

21244334312 is a deficient number, since it is larger than the sum of its proper divisors (18588792538).

21244334312 is a wasteful number, since it uses less digits than its factorization.

21244334312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2655541795 (or 2655541791 counting only the distinct ones).

The product of its digits is 13824, while the sum is 29.

Adding to 21244334312 its reverse (21343344212), we get a palindrome (42587678524).

The spelling of 21244334312 in words is "twenty-one billion, two hundred forty-four million, three hundred thirty-four thousand, three hundred twelve".