111121222211120 has 320 divisors, whose sum is σ = 300303299073024. Its totient is φ = 37843068764160.

The previous prime is 111121222211113. The next prime is 111121222211159. The reversal of 111121222211120 is 21112222121111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 111121222211092 and 111121222211101.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 202145759 + ... + 202694721.

Almost surely, 2^{111121222211120} is an apocalyptic number.

111121222211120 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 111121222211120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150151649536512).

111121222211120 is an abundant number, since it is smaller than the sum of its proper divisors (189182076861904).

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

111121222211120 is a wasteful number, since it uses less digits than its factorization.

111121222211120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549220 (or 549214 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111121222211120 its reverse (21112222121111), we get a palindrome (132233444332231).

Subtracting from 111121222211120 its reverse (21112222121111), we obtain a palindrome (90009000090009).

It can be divided in two parts, 1111212 and 22211120, that added together give a palindrome (23322332).

The spelling of 111121222211120 in words is "one hundred eleven trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred eleven thousand, one hundred twenty".