21311103444004 has 12 divisors (see below), whose sum is σ = 40684833847728. Its totient is φ = 9686865201800.

The previous prime is 21311103443977. The next prime is 21311103444013. The reversal of 21311103444004 is 40044430111312.

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, 242171630002 + ... + 242171630089.

It is an arithmetic number, because the mean of its divisors is an integer number (3390402820644).

Almost surely, 2^{21311103444004} is an apocalyptic number.

It is an amenable number.

21311103444004 is a deficient number, since it is larger than the sum of its proper divisors (19373730403724).

21311103444004 is a wasteful number, since it uses less digits than its factorization.

21311103444004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484343260106 (or 484343260104 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21311103444004 its reverse (40044430111312), we get a palindrome (61355533555316).

The spelling of 21311103444004 in words is "twenty-one trillion, three hundred eleven billion, one hundred three million, four hundred forty-four thousand, four".