1111123312 has 20 divisors (see below), whose sum is σ = 2318401960. Its totient is φ = 512826048.

The previous prime is 1111123301. The next prime is 1111123319. The reversal of 1111123312 is 2133211111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111123319) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2670762 + ... + 2671177.

It is an arithmetic number, because the mean of its divisors is an integer number (115920098).

Almost surely, 2^1111123312 is an apocalyptic number.

It is an amenable number.

1111123312 is an abundant number, since it is smaller than the sum of its proper divisors (1207278648).

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

1111123312 is a wasteful number, since it uses less digits than its factorization.

1111123312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5341960 (or 5341954 counting only the distinct ones).

The product of its digits is 36, while the sum is 16.

The square root of 1111123312 is about 33333.5163461643. The cubic root of 1111123312 is about 1035.7479597373.

Adding to 1111123312 its reverse (2133211111), we get a palindrome (3244334423).

The spelling of 1111123312 in words is "one billion, one hundred eleven million, one hundred twenty-three thousand, three hundred twelve".