11201110021 has 4 divisors (see below), whose sum is σ = 11201560812. Its totient is φ = 11200659232.

The previous prime is 11201109989. The next prime is 11201110097. The reversal of 11201110021 is 12001110211.

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 5667981796 + 5533128225 = 75286^2 + 74385^2 .

It is a cyclic number.

It is not a de Polignac number, because 11201110021 - 2⁵ = 11201109989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201110321) 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, 185806 + ... + 238591.

It is an arithmetic number, because the mean of its divisors is an integer number (2800390203).

Almost surely, 2^11201110021 is an apocalyptic number.

It is an amenable number.

11201110021 is a deficient number, since it is larger than the sum of its proper divisors (450791).

11201110021 is an equidigital number, since it uses as much as digits as its factorization.

11201110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450790.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11201110021 its reverse (12001110211), we get a palindrome (23202220232).

The spelling of 11201110021 in words is "eleven billion, two hundred one million, one hundred ten thousand, twenty-one".