111100212120 has 96 divisors (see below), whose sum is σ = 338062970160. Its totient is φ = 29209286400.

The previous prime is 111100212103. The next prime is 111100212127. The reversal of 111100212120 is 21212001111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 111100212096 and 111100212105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100212127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 513090 + ... + 696750.

Almost surely, 2^111100212120 is an apocalyptic number.

111100212120 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 111100212120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169031485080).

111100212120 is an abundant number, since it is smaller than the sum of its proper divisors (226962758040).

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

111100212120 is a wasteful number, since it uses less digits than its factorization.

111100212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183817 (or 183742 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111100212120 its reverse (21212001111), we get a palindrome (132312213231).

The spelling of 111100212120 in words is "one hundred eleven billion, one hundred million, two hundred twelve thousand, one hundred twenty".