111220211120 has 80 divisors (see below), whose sum is σ = 273913941600. Its totient is φ = 41853407232.

The previous prime is 111220211059. The next prime is 111220211131. The reversal of 111220211120 is 21112022111.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 111220211095 and 111220211104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3450599 + ... + 3482681.

It is an arithmetic number, because the mean of its divisors is an integer number (3423924270).

Almost surely, 2^111220211120 is an apocalyptic number.

111220211120 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 111220211120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136956970800).

111220211120 is an abundant number, since it is smaller than the sum of its proper divisors (162693730480).

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

111220211120 is a wasteful number, since it uses less digits than its factorization.

111220211120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34662 (or 34656 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111220211120 its reverse (21112022111), we get a palindrome (132332233231).

The spelling of 111220211120 in words is "one hundred eleven billion, two hundred twenty million, two hundred eleven thousand, one hundred twenty".