1123223013220 has 288 divisors, whose sum is σ = 3019039769088. Its totient is φ = 343512576000.

The previous prime is 1123223013193. The next prime is 1123223013223. The reversal of 1123223013220 is 223103223211.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1123223013191 and 1123223013200.

It is not an unprimeable number, because it can be changed into a prime (1123223013223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 519768940 + ... + 519771100.

It is an arithmetic number, because the mean of its divisors is an integer number (10482776976).

Almost surely, 2^{1123223013220} is an apocalyptic number.

1123223013220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123223013220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1509519884544).

1123223013220 is an abundant number, since it is smaller than the sum of its proper divisors (1895816755868).

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

1123223013220 is a wasteful number, since it uses less digits than its factorization.

1123223013220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763 (or 2750 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1123223013220 its reverse (223103223211), we get a palindrome (1346326236431).

The spelling of 1123223013220 in words is "one trillion, one hundred twenty-three billion, two hundred twenty-three million, thirteen thousand, two hundred twenty".