111111220000 has 120 divisors (see below), whose sum is σ = 298200882672. Its totient is φ = 40404000000.

The previous prime is 111111219997. The next prime is 111111220001. The reversal of 111111220000 is 22111111.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (111111220001) 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, 32526 + ... + 472525.

Almost surely, 2^111111220000 is an apocalyptic number.

111111220000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111111220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149100441336).

111111220000 is an abundant number, since it is smaller than the sum of its proper divisors (187089662672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111111220000 is an equidigital number, since it uses as much as digits as its factorization.

111111220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505092 (or 505069 counting only the distinct ones).

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

Adding to 111111220000 its reverse (22111111), we get a palindrome (111133331111).

The spelling of 111111220000 in words is "one hundred eleven billion, one hundred eleven million, two hundred twenty thousand".