21444014121212 has 6 divisors (see below), whose sum is σ = 37527024712128. Its totient is φ = 10722007060604.

The previous prime is 21444014121193. The next prime is 21444014121259. The reversal of 21444014121212 is 21212141044412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2680501765148 + ... + 2680501765155.

It is an arithmetic number, because the mean of its divisors is an integer number (6254504118688).

Almost surely, 2^{21444014121212} is an apocalyptic number.

It is an amenable number.

21444014121212 is a deficient number, since it is larger than the sum of its proper divisors (16083010590916).

21444014121212 is a wasteful number, since it uses less digits than its factorization.

21444014121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5361003530307 (or 5361003530305 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 29.

Adding to 21444014121212 its reverse (21212141044412), we get a palindrome (42656155165624).

The spelling of 21444014121212 in words is "twenty-one trillion, four hundred forty-four billion, fourteen million, one hundred twenty-one thousand, two hundred twelve".