11111220000111 has 24 divisors (see below), whose sum is σ = 18800431617024. Its totient is φ = 5772062336880.

The previous prime is 11111219999987. The next prime is 11111220000151. The reversal of 11111220000111 is 11100002211111.

It is not a de Polignac number, because 11111220000111 - 2⁷ = 11111219999983 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111220000151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3435749775 + ... + 3435753008.

It is an arithmetic number, because the mean of its divisors is an integer number (783351317376).

Almost surely, 2^{11111220000111} is an apocalyptic number.

11111220000111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11111220000111 is a deficient number, since it is larger than the sum of its proper divisors (7689211616913).

11111220000111 is a wasteful number, since it uses less digits than its factorization.

11111220000111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6871502811 (or 6871502804 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11111220000111 its reverse (11100002211111), we get a palindrome (22211222211222).

The spelling of 11111220000111 in words is "eleven trillion, one hundred eleven billion, two hundred twenty million, one hundred eleven", and thus it is an aban number.