111122220000 has 480 divisors, whose sum is σ = 401817677184. Its totient is φ = 26656000000.

The previous prime is 111122219959. The next prime is 111122220017. The reversal of 111122220000 is 22221111.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 66659167 + ... + 66660833.

Almost surely, 2^111122220000 is an apocalyptic number.

111122220000 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 111122220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200908838592).

111122220000 is an abundant number, since it is smaller than the sum of its proper divisors (290695457184).

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

111122220000 is a wasteful number, since it uses less digits than its factorization.

111122220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812 (or 1789 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 111122220000 its reverse (22221111), we get a palindrome (111144441111).

It can be divided in two parts, 1111 and 22220000, that added together give a triangular number (22221111 = T₆₆₆₆).

The spelling of 111122220000 in words is "one hundred eleven billion, one hundred twenty-two million, two hundred twenty thousand".