21300011105 has 4 divisors (see below), whose sum is σ = 25560013332. Its totient is φ = 17040008880.

The previous prime is 21300011101. The next prime is 21300011141. The reversal of 21300011105 is 50111000312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3148107664 + 18151903441 = 56108^2 + 134729^2 .

It is not a de Polignac number, because 21300011105 - 2² = 21300011101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21300011105.

It is not an unprimeable number, because it can be changed into a prime (21300011101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2130001106 + ... + 2130001115.

It is an arithmetic number, because the mean of its divisors is an integer number (6390003333).

Almost surely, 2^21300011105 is an apocalyptic number.

It is an amenable number.

21300011105 is a deficient number, since it is larger than the sum of its proper divisors (4260002227).

21300011105 is an equidigital number, since it uses as much as digits as its factorization.

21300011105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4260002226.

The product of its (nonzero) digits is 30, while the sum is 14.

Adding to 21300011105 its reverse (50111000312), we get a palindrome (71411011417).

The spelling of 21300011105 in words is "twenty-one billion, three hundred million, eleven thousand, one hundred five".