1111312120 has 16 divisors (see below), whose sum is σ = 2500452360. Its totient is φ = 444524832.

The previous prime is 1111312073. The next prime is 1111312127. The reversal of 1111312120 is 212131111.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111312120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111312127) 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, 13891362 + ... + 13891441.

Almost surely, 2^1111312120 is an apocalyptic number.

1111312120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111312120 is an abundant number, since it is smaller than the sum of its proper divisors (1389140240).

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

1111312120 is a wasteful number, since it uses less digits than its factorization.

1111312120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27782814 (or 27782810 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1111312120 is about 33336.3483303136. The cubic root of 1111312120 is about 1035.8066230206.

Adding to 1111312120 its reverse (212131111), we get a palindrome (1323443231).

The spelling of 1111312120 in words is "one billion, one hundred eleven million, three hundred twelve thousand, one hundred twenty".