1123243422112 has 384 divisors, whose sum is σ = 2759898355200. Its totient is φ = 439404134400.

The previous prime is 1123243422071. The next prime is 1123243422137. The reversal of 1123243422112 is 2112243423211.

It is a super-2 number, since 2×1123243422112² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3997307412 + ... + 3997307692.

It is an arithmetic number, because the mean of its divisors is an integer number (7187235300).

Almost surely, 2^{1123243422112} 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 1123243422112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1379949177600).

1123243422112 is an abundant number, since it is smaller than the sum of its proper divisors (1636654933088).

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

1123243422112 is a wasteful number, since it uses less digits than its factorization.

1123243422112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640 (or 632 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

Adding to 1123243422112 its reverse (2112243423211), we get a palindrome (3235486845323).

The spelling of 1123243422112 in words is "one trillion, one hundred twenty-three billion, two hundred forty-three million, four hundred twenty-two thousand, one hundred twelve".