1121304312 has 24 divisors (see below), whose sum is σ = 3036866040. Its totient is φ = 373768080.

The previous prime is 1121304307. The next prime is 1121304413. The reversal of 1121304312 is 2134031211.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7786764 + ... + 7786907.

It is an arithmetic number, because the mean of its divisors is an integer number (126536085).

Almost surely, 2^1121304312 is an apocalyptic number.

1121304312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1121304312 is an abundant number, since it is smaller than the sum of its proper divisors (1915561728).

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

1121304312 is a wasteful number, since it uses less digits than its factorization.

1121304312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15573683 (or 15573676 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1121304312 is about 33485.8822789545. The cubic root of 1121304312 is about 1038.9017968590.

Adding to 1121304312 its reverse (2134031211), we get a palindrome (3255335523).

The spelling of 1121304312 in words is "one billion, one hundred twenty-one million, three hundred four thousand, three hundred twelve".