1123221132220 has 96 divisors (see below), whose sum is σ = 2662929017280. Its totient is φ = 394211543040.

The previous prime is 1123221132179. The next prime is 1123221132239. The reversal of 1123221132220 is 222311223211.

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 = 1123221132191 and 1123221132200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17685562 + ... + 17748958.

It is an arithmetic number, because the mean of its divisors is an integer number (27738843930).

Almost surely, 2^{1123221132220} is an apocalyptic number.

1123221132220 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 1123221132220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1331464508640).

1123221132220 is an abundant number, since it is smaller than the sum of its proper divisors (1539707885060).

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

1123221132220 is a wasteful number, since it uses less digits than its factorization.

1123221132220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66223 (or 66221 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1123221132220 its reverse (222311223211), we get a palindrome (1345532355431).

Subtracting from 1123221132220 its reverse (222311223211), we obtain a palindrome (900909909009).

The spelling of 1123221132220 in words is "one trillion, one hundred twenty-three billion, two hundred twenty-one million, one hundred thirty-two thousand, two hundred twenty".