1123231122 has 144 divisors (see below), whose sum is σ = 2793593088. Its totient is φ = 325503360.

The previous prime is 1123231117. The next prime is 1123231129. The reversal of 1123231122 is 2211323211.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1123231095 and 1123231104.

It is not an unprimeable number, because it can be changed into a prime (1123231129) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4054848 + ... + 4055124.

It is an arithmetic number, because the mean of its divisors is an integer number (19399952).

Almost surely, 2^1123231122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123231122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1396796544).

1123231122 is an abundant number, since it is smaller than the sum of its proper divisors (1670361966).

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

1123231122 is a wasteful number, since it uses less digits than its factorization.

1123231122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 369 counting only the distinct ones).

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

The square root of 1123231122 is about 33514.6404128106. The cubic root of 1123231122 is about 1039.4965271372.

Adding to 1123231122 its reverse (2211323211), we get a palindrome (3334554333).

The spelling of 1123231122 in words is "one billion, one hundred twenty-three million, two hundred thirty-one thousand, one hundred twenty-two".