111220021111120 has 80 divisors (see below), whose sum is σ = 260115562788480. Its totient is φ = 44225020150272.

The previous prime is 111220021111033. The next prime is 111220021111123. The reversal of 111220021111120 is 21111120022111.

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

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 111220021111094 and 111220021111103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220021111123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105197767 + ... + 106249753.

It is an arithmetic number, because the mean of its divisors is an integer number (3251444534856).

Almost surely, 2^{111220021111120} is an apocalyptic number.

111220021111120 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 111220021111120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130057781394240).

111220021111120 is an abundant number, since it is smaller than the sum of its proper divisors (148895541677360).

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

111220021111120 is a wasteful number, since it uses less digits than its factorization.

111220021111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059812 (or 1059806 counting only the distinct ones).

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

Adding to 111220021111120 its reverse (21111120022111), we get a palindrome (132331141133231).

The spelling of 111220021111120 in words is "one hundred eleven trillion, two hundred twenty billion, twenty-one million, one hundred eleven thousand, one hundred twenty".