111001010120 has 384 divisors, whose sum is σ = 345788593920. Its totient is φ = 31188326400.

The previous prime is 111001010101. The next prime is 111001010161. The reversal of 111001010120 is 21010100111.

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 = 111001010098 and 111001010107.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18935990 + ... + 18941850.

It is an arithmetic number, because the mean of its divisors is an integer number (900491130).

Almost surely, 2^111001010120 is an apocalyptic number.

111001010120 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 111001010120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172894296960).

111001010120 is an abundant number, since it is smaller than the sum of its proper divisors (234787583800).

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

111001010120 is a wasteful number, since it uses less digits than its factorization.

111001010120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5957 (or 5942 counting only the distinct ones).

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

Adding to 111001010120 its reverse (21010100111), we get a palindrome (132011110231).

The spelling of 111001010120 in words is "one hundred eleven billion, one million, ten thousand, one hundred twenty".