111121220110000 has 100 divisors (see below), whose sum is σ = 269211348498664. Its totient is φ = 44419449600000.

The previous prime is 111121220109997. The next prime is 111121220110007. The reversal of 111121220110000 is 11022121111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (100).

It is not an unprimeable number, because it can be changed into a prime (111121220110007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11680960 + ... + 18939040.

Almost surely, 2^{111121220110000} is an apocalyptic number.

111121220110000 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 111121220110000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134605674249332).

111121220110000 is an abundant number, since it is smaller than the sum of its proper divisors (158090128388664).

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

111121220110000 is an equidigital number, since it uses as much as digits as its factorization.

111121220110000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7259640 (or 7259619 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111121220110000 its reverse (11022121111), we get a palindrome (111132242231111).

The spelling of 111121220110000 in words is "one hundred eleven trillion, one hundred twenty-one billion, two hundred twenty million, one hundred ten thousand".