111212110012120 has 128 divisors (see below), whose sum is σ = 272159555472000. Its totient is φ = 40653981388800.

The previous prime is 111212110012051. The next prime is 111212110012123. The reversal of 111212110012120 is 21210011212111.

It is a junction number, because it is equal to n+sod(n) for n = 111212110012094 and 111212110012103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212110012123) 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, 1069202676 + ... + 1069306684.

It is an arithmetic number, because the mean of its divisors is an integer number (2126246527125).

Almost surely, 2^{111212110012120} is an apocalyptic number.

111212110012120 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 111212110012120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136079777736000).

111212110012120 is an abundant number, since it is smaller than the sum of its proper divisors (160947445459880).

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

111212110012120 is a wasteful number, since it uses less digits than its factorization.

111212110012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124493 (or 124489 counting only the distinct ones).

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

Adding to 111212110012120 its reverse (21210011212111), we get a palindrome (132422121224231).

The spelling of 111212110012120 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred ten million, twelve thousand, one hundred twenty".