1121305188 has 24 divisors (see below), whose sum is σ = 2618542080. Its totient is φ = 373459360.

The previous prime is 1121305139. The next prime is 1121305219. The reversal of 1121305188 is 8815031211.

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 7 ways as a sum of consecutive naturals, for example, 23268 + ... + 52763.

It is an arithmetic number, because the mean of its divisors is an integer number (109105920).

Almost surely, 2^1121305188 is an apocalyptic number.

It is an amenable number.

1121305188 is an abundant number, since it is smaller than the sum of its proper divisors (1497236892).

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

1121305188 is a wasteful number, since it uses less digits than its factorization.

1121305188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77267 (or 77265 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 30.

The square root of 1121305188 is about 33485.8953590911. The cubic root of 1121305188 is about 1038.9020674004.

Adding to 1121305188 its reverse (8815031211), we get a palindrome (9936336399).

The spelling of 1121305188 in words is "one billion, one hundred twenty-one million, three hundred five thousand, one hundred eighty-eight".