111101222221120 has 224 divisors, whose sum is σ = 281982251376000. Its totient is φ = 41574579830784.

The previous prime is 111101222221021. The next prime is 111101222221123. The reversal of 111101222221120 is 21122222101111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101222221123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 264592459 + ... + 265012021.

It is an arithmetic number, because the mean of its divisors is an integer number (1258849336500).

Almost surely, 2^{111101222221120} is an apocalyptic number.

111101222221120 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 111101222221120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140991125688000).

111101222221120 is an abundant number, since it is smaller than the sum of its proper divisors (170881029154880).

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

111101222221120 is a wasteful number, since it uses less digits than its factorization.

111101222221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420145 (or 420135 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111101222221120 its reverse (21122222101111), we get a palindrome (132223444322231).

The spelling of 111101222221120 in words is "one hundred eleven trillion, one hundred one billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty".