111212011200120 has 128 divisors (see below), whose sum is σ = 337226609664000. Its totient is φ = 29338712234496.

The previous prime is 111212011200089. The next prime is 111212011200181. The reversal of 111212011200120 is 21002110212111.

It is a happy number.

It is a super-2 number, since 2×111212011200120² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 111212011200120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5135934 + ... + 15773453.

It is an arithmetic number, because the mean of its divisors is an integer number (2634582888000).

Almost surely, 2^{111212011200120} is an apocalyptic number.

111212011200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212011200120 is an abundant number, since it is smaller than the sum of its proper divisors (226014598463880).

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

111212011200120 is a wasteful number, since it uses less digits than its factorization.

111212011200120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20909877 (or 20909873 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111212011200120 its reverse (21002110212111), we get a palindrome (132214121412231).

The spelling of 111212011200120 in words is "one hundred eleven trillion, two hundred twelve billion, eleven million, two hundred thousand, one hundred twenty".