11100120111 has 12 divisors (see below), whose sum is σ = 16305261960. Its totient is φ = 7274654640.

The previous prime is 11100120107. The next prime is 11100120113. The reversal of 11100120111 is 11102100111.

It is not a de Polignac number, because 11100120111 - 2² = 11100120107 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 = 11100120093 and 11100120102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100120113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10451560 + ... + 10452621.

It is an arithmetic number, because the mean of its divisors is an integer number (1358771830).

Almost surely, 2^11100120111 is an apocalyptic number.

11100120111 is a deficient number, since it is larger than the sum of its proper divisors (5205141849).

11100120111 is a wasteful number, since it uses less digits than its factorization.

11100120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20904246 (or 20904243 counting only the distinct ones).

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

Adding to 11100120111 its reverse (11102100111), we get a palindrome (22202220222).

The spelling of 11100120111 in words is "eleven billion, one hundred million, one hundred twenty thousand, one hundred eleven".