111000020120 has 128 divisors (see below), whose sum is σ = 276786720000. Its totient is φ = 39725575680.

The previous prime is 111000020077. The next prime is 111000020123. The reversal of 111000020120 is 21020000111.

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 = 111000020098 and 111000020107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111000020123) 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, 9818231 + ... + 9829529.

It is an arithmetic number, because the mean of its divisors is an integer number (2162396250).

Almost surely, 2^111000020120 is an apocalyptic number.

111000020120 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 111000020120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138393360000).

111000020120 is an abundant number, since it is smaller than the sum of its proper divisors (165786699880).

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

111000020120 is a wasteful number, since it uses less digits than its factorization.

111000020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11673 (or 11669 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 111000020120 its reverse (21020000111), we get a palindrome (132020020231).

The spelling of 111000020120 in words is "one hundred eleven billion, twenty thousand, one hundred twenty".