111220122110020 has 144 divisors (see below), whose sum is σ = 292665304165248. Its totient is φ = 34491792107520.

The previous prime is 111220122110003. The next prime is 111220122110047. The reversal of 111220122110020 is 20011221022111.

It is a junction number, because it is equal to n+sod(n) for n = 111220122109976 and 111220122110003.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60073684 + ... + 61897396.

It is an arithmetic number, because the mean of its divisors is an integer number (2032397945592).

Almost surely, 2^{111220122110020} is an apocalyptic number.

111220122110020 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 111220122110020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146332652082624).

111220122110020 is an abundant number, since it is smaller than the sum of its proper divisors (181445182055228).

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

111220122110020 is a wasteful number, since it uses less digits than its factorization.

111220122110020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824138 (or 1823937 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111220122110020 its reverse (20011221022111), we get a palindrome (131231343132131).

The spelling of 111220122110020 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred twenty-two million, one hundred ten thousand, twenty".