1123220212120 has 128 divisors (see below), whose sum is σ = 2586347366400. Its totient is φ = 438917907456.

The previous prime is 1123220212097. The next prime is 1123220212129. The reversal of 1123220212120 is 212120223211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123220212129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 215628076 + ... + 215633284.

It is an arithmetic number, because the mean of its divisors is an integer number (20205838800).

Almost surely, 2^{1123220212120} is an apocalyptic number.

1123220212120 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 1123220212120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1293173683200).

1123220212120 is an abundant number, since it is smaller than the sum of its proper divisors (1463127154280).

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

1123220212120 is a wasteful number, since it uses less digits than its factorization.

1123220212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6017 (or 6013 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1123220212120 its reverse (212120223211), we get a palindrome (1335340435331).

The spelling of 1123220212120 in words is "one trillion, one hundred twenty-three billion, two hundred twenty million, two hundred twelve thousand, one hundred twenty".