111212110121112 has 384 divisors, whose sum is σ = 415337620239360. Its totient is φ = 25943586370560.

The previous prime is 111212110121083. The next prime is 111212110121113. The reversal of 111212110121112 is 211121011212111.

111212110121112 is a `hidden beast` number, since 111 + 212 + 110 + 121 + 112 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212110121113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18185628 + ... + 23518955.

It is an arithmetic number, because the mean of its divisors is an integer number (1081608386040).

Almost surely, 2^{111212110121112} is an apocalyptic number.

111212110121112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111212110121112 is an abundant number, since it is smaller than the sum of its proper divisors (304125510118248).

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

111212110121112 is a wasteful number, since it uses less digits than its factorization.

111212110121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41704663 (or 41704656 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 111212110121112 its reverse (211121011212111), we get a palindrome (322333121333223).

The spelling of 111212110121112 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred ten million, one hundred twenty-one thousand, one hundred twelve".