11101020111 has 20 divisors (see below), whose sum is σ = 17558478432. Its totient is φ = 6965345088.

The previous prime is 11101020109. The next prime is 11101020163. The reversal of 11101020111 is 11102010111.

It is not a de Polignac number, because 11101020111 - 2¹ = 11101020109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11101020093 and 11101020102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101020101) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4029495 + ... + 4032248.

Almost surely, 2^11101020111 is an apocalyptic number.

11101020111 is a deficient number, since it is larger than the sum of its proper divisors (6457458321).

11101020111 is an equidigital number, since it uses as much as digits as its factorization.

11101020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8061772 (or 8061763 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 11101020111 its reverse (11102010111), we get a palindrome (22203030222).

The spelling of 11101020111 in words is "eleven billion, one hundred one million, twenty thousand, one hundred eleven".