1123312120 has 64 divisors (see below), whose sum is σ = 2891750400. Its totient is φ = 384704640.

The previous prime is 1123312109. The next prime is 1123312121. The reversal of 1123312120 is 212133211.

It is a junction number, because it is equal to n+sod(n) for n = 1123312094 and 1123312103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123312121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343051 + ... + 346309.

It is an arithmetic number, because the mean of its divisors is an integer number (45183600).

Almost surely, 2^1123312120 is an apocalyptic number.

1123312120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123312120 is an abundant number, since it is smaller than the sum of its proper divisors (1768438280).

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

1123312120 is a wasteful number, since it uses less digits than its factorization.

1123312120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4508 (or 4504 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1123312120 is about 33515.8487882972. The cubic root of 1123312120 is about 1039.5215131245.

Adding to 1123312120 its reverse (212133211), we get a palindrome (1335445331).

The spelling of 1123312120 in words is "one billion, one hundred twenty-three million, three hundred twelve thousand, one hundred twenty".