1123521112 has 64 divisors (see below), whose sum is σ = 2518087680. Its totient is φ = 459499392.

The previous prime is 1123521031. The next prime is 1123521151. The reversal of 1123521112 is 2111253211.

It is a self number, because there is not a number n which added to its sum of digits gives 1123521112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 788833 + ... + 790255.

It is an arithmetic number, because the mean of its divisors is an integer number (39345120).

Almost surely, 2^1123521112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123521112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1259043840).

1123521112 is an abundant number, since it is smaller than the sum of its proper divisors (1394566568).

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

1123521112 is a wasteful number, since it uses less digits than its factorization.

1123521112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072 (or 2068 counting only the distinct ones).

The product of its digits is 120, while the sum is 19.

The square root of 1123521112 is about 33518.9664518463. The cubic root of 1123521112 is about 1039.5859767182.

Adding to 1123521112 its reverse (2111253211), we get a palindrome (3234774323).

The spelling of 1123521112 in words is "one billion, one hundred twenty-three million, five hundred twenty-one thousand, one hundred twelve".