1111111120 has 120 divisors (see below), whose sum is σ = 2997558144. Its totient is φ = 375197184.

The previous prime is 1111111097. The next prime is 1111111121. The reversal of 1111111120 is 211111111.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1111111097 and 1111111106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111111121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6653277 + ... + 6653443.

Almost surely, 2^1111111120 is an apocalyptic number.

1111111120 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 1111111120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1498779072).

1111111120 is an abundant number, since it is smaller than the sum of its proper divisors (1886447024).

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

1111111120 is a wasteful number, since it uses less digits than its factorization.

1111111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 10.

The square root of 1111111120 is about 33333.3334666667. Note that the first 3 decimals coincide. The cubic root of 1111111120 is about 1035.7441714133.

Adding to 1111111120 its reverse (211111111), we get a palindrome (1322222231).

Subtracting from 1111111120 its reverse (211111111), we obtain a palindrome (900000009).

The spelling of 1111111120 in words is "one billion, one hundred eleven million, one hundred eleven thousand, one hundred twenty".