1111312320 has 112 divisors (see below), whose sum is σ = 3562990080. Its totient is φ = 293446656.

The previous prime is 1111312303. The next prime is 1111312343. The reversal of 1111312320 is 232131111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1111312320.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 93261 + ... + 104499.

Almost surely, 2^1111312320 is an apocalyptic number.

1111312320 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 1111312320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1781495040).

1111312320 is an abundant number, since it is smaller than the sum of its proper divisors (2451677760).

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

1111312320 is a wasteful number, since it uses less digits than its factorization.

1111312320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11362 (or 11352 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1111312320 is about 33336.3513300421. The cubic root of 1111312320 is about 1035.8066851578.

Adding to 1111312320 its reverse (232131111), we get a palindrome (1343443431).

The spelling of 1111312320 in words is "one billion, one hundred eleven million, three hundred twelve thousand, three hundred twenty".