111111221120 has 64 divisors (see below), whose sum is σ = 265947721200. Its totient is φ = 44390535168.

The previous prime is 111111221119. The next prime is 111111221153. The reversal of 111111221120 is 21122111111.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 111111221095 and 111111221104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424316 + ... + 634244.

Almost surely, 2^111111221120 is an apocalyptic number.

111111221120 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 111111221120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132973860600).

111111221120 is an abundant number, since it is smaller than the sum of its proper divisors (154836500080).

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

111111221120 is an equidigital number, since it uses as much as digits as its factorization.

111111221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210775 (or 210763 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111111221120 its reverse (21122111111), we get a palindrome (132233332231).

The spelling of 111111221120 in words is "one hundred eleven billion, one hundred eleven million, two hundred twenty-one thousand, one hundred twenty".