111001100120 has 16 divisors (see below), whose sum is σ = 249752475360. Its totient is φ = 44400440032.

The previous prime is 111001100107. The next prime is 111001100123. The reversal of 111001100120 is 21001100111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a junction number, because it is equal to n+sod(n) for n = 111001100098 and 111001100107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111001100123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1387513712 + ... + 1387513791.

It is an arithmetic number, because the mean of its divisors is an integer number (15609529710).

Almost surely, 2^111001100120 is an apocalyptic number.

111001100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111001100120 is an abundant number, since it is smaller than the sum of its proper divisors (138751375240).

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

111001100120 is a wasteful number, since it uses less digits than its factorization.

111001100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775027514 (or 2775027510 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 111001100120 its reverse (21001100111), we get a palindrome (132002200231).

Subtracting from 111001100120 its reverse (21001100111), we obtain a palindrome (90000000009).

The spelling of 111001100120 in words is "one hundred eleven billion, one million, one hundred thousand, one hundred twenty".