111212110121120 has 96 divisors (see below), whose sum is σ = 268587069004800. Its totient is φ = 43496450850816.

The previous prime is 111212110121113. The next prime is 111212110121143. The reversal of 111212110121120 is 21121011212111.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 696416 + ... + 14930144.

It is an arithmetic number, because the mean of its divisors is an integer number (2797781968800).

Almost surely, 2^{111212110121120} is an apocalyptic number.

111212110121120 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 111212110121120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134293534502400).

111212110121120 is an abundant number, since it is smaller than the sum of its proper divisors (157374958883680).

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

111212110121120 is a wasteful number, since it uses less digits than its factorization.

111212110121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14234830 (or 14234822 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111212110121120 its reverse (21121011212111), we get a palindrome (132333121333231).

The spelling of 111212110121120 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred ten million, one hundred twenty-one thousand, one hundred twenty".