21120011101105 has 48 divisors (see below), whose sum is σ = 29192536961280. Its totient is φ = 14369131157760.

The previous prime is 21120011101051. The next prime is 21120011101171. The reversal of 21120011101105 is 50110111002112.

It is not a de Polignac number, because 21120011101105 - 2¹³ = 21120011092913 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 503351787 + ... + 503393743.

It is an arithmetic number, because the mean of its divisors is an integer number (608177853360).

Almost surely, 2^{21120011101105} is an apocalyptic number.

It is an amenable number.

21120011101105 is a deficient number, since it is larger than the sum of its proper divisors (8072525860175).

21120011101105 is an equidigital number, since it uses as much as digits as its factorization.

21120011101105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42770 (or 42589 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 16.

Adding to 21120011101105 its reverse (50110111002112), we get a palindrome (71230122103217).

The spelling of 21120011101105 in words is "twenty-one trillion, one hundred twenty billion, eleven million, one hundred one thousand, one hundred five".