11100020111 has 4 divisors (see below), whose sum is σ = 11100531000. Its totient is φ = 11099509224.

The previous prime is 11100020059. The next prime is 11100020119. The reversal of 11100020111 is 11102000111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 11100020111 - 2³⁰ = 10026278287 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 (11100020119) 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, 221336 + ... + 266813.

It is an arithmetic number, because the mean of its divisors is an integer number (2775132750).

Almost surely, 2^11100020111 is an apocalyptic number.

11100020111 is a deficient number, since it is larger than the sum of its proper divisors (510889).

11100020111 is an equidigital number, since it uses as much as digits as its factorization.

11100020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510888.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 11100020111 its reverse (11102000111), we get a palindrome (22202020222).

The spelling of 11100020111 in words is "eleven billion, one hundred million, twenty thousand, one hundred eleven".