1123421233220 has 192 divisors, whose sum is σ = 2862645166080. Its totient is φ = 364723084800.

The previous prime is 1123421233199. The next prime is 1123421233229. The reversal of 1123421233220 is 223321243211.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 1123421233220.

It is not an unprimeable number, because it can be changed into a prime (1123421233229) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 307027751 + ... + 307031409.

It is an arithmetic number, because the mean of its divisors is an integer number (14909610240).

Almost surely, 2^{1123421233220} is an apocalyptic number.

1123421233220 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 1123421233220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1431322583040).

1123421233220 is an abundant number, since it is smaller than the sum of its proper divisors (1739223932860).

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

1123421233220 is a wasteful number, since it uses less digits than its factorization.

1123421233220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7186 (or 7184 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 1123421233220 its reverse (223321243211), we get a palindrome (1346742476431).

Subtracting from 1123421233220 its reverse (223321243211), we obtain a palindrome (900099990009).

The spelling of 1123421233220 in words is "one trillion, one hundred twenty-three billion, four hundred twenty-one million, two hundred thirty-three thousand, two hundred twenty".