21444022412312 has 8 divisors (see below), whose sum is σ = 40207542023100. Its totient is φ = 10722011206152.

The previous prime is 21444022412299. The next prime is 21444022412321. The reversal of 21444022412312 is 21321422044412.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340251400762 + ... + 1340251400777.

Almost surely, 2^{21444022412312} is an apocalyptic number.

It is an amenable number.

21444022412312 is a deficient number, since it is larger than the sum of its proper divisors (18763519610788).

21444022412312 is a wasteful number, since it uses less digits than its factorization.

21444022412312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2680502801545 (or 2680502801541 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 21444022412312 its reverse (21321422044412), we get a palindrome (42765444456724).

The spelling of 21444022412312 in words is "twenty-one trillion, four hundred forty-four billion, twenty-two million, four hundred twelve thousand, three hundred twelve".