21044114505505 has 16 divisors (see below), whose sum is σ = 31080538347264. Its totient is φ = 13320230719680.

The previous prime is 21044114505499. The next prime is 21044114505569. The reversal of 21044114505505 is 50550541144012.

It is not a de Polignac number, because 21044114505505 - 2⁵ = 21044114505473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23125400101 + ... + 23125401010.

It is an arithmetic number, because the mean of its divisors is an integer number (1942533646704).

Almost surely, 2^{21044114505505} is an apocalyptic number.

It is an amenable number.

21044114505505 is a deficient number, since it is larger than the sum of its proper divisors (10036423841759).

21044114505505 is a wasteful number, since it uses less digits than its factorization.

21044114505505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46250801136.

The product of its (nonzero) digits is 80000, while the sum is 37.

Adding to 21044114505505 its reverse (50550541144012), we get a palindrome (71594655649517).

The spelling of 21044114505505 in words is "twenty-one trillion, forty-four billion, one hundred fourteen million, five hundred five thousand, five hundred five".