1121230320 has 160 divisors (see below), whose sum is σ = 4100689920. Its totient is φ = 248002560.

The previous prime is 1121230273. The next prime is 1121230339. The reversal of 1121230320 is 230321211.

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 1121230320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41316 + ... + 62844.

It is an arithmetic number, because the mean of its divisors is an integer number (25629312).

Almost surely, 2^1121230320 is an apocalyptic number.

1121230320 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 1121230320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2050344960).

1121230320 is an abundant number, since it is smaller than the sum of its proper divisors (2979459600).

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

1121230320 is a wasteful number, since it uses less digits than its factorization.

1121230320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21583 (or 21577 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1121230320 is about 33484.7774369190. Note that the first 3 decimals coincide. The cubic root of 1121230320 is about 1038.8789448667.

Adding to 1121230320 its reverse (230321211), we get a palindrome (1351551531).

The spelling of 1121230320 in words is "one billion, one hundred twenty-one million, two hundred thirty thousand, three hundred twenty".