1123221232100 has 108 divisors (see below), whose sum is σ = 2679671812944. Its totient is φ = 408359160000.

The previous prime is 1123221232037. The next prime is 1123221232109. The reversal of 1123221232100 is 12321223211.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1123221232109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 109995995 + ... + 110006205.

Almost surely, 2^{1123221232100} is an apocalyptic number.

1123221232100 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 1123221232100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339835906472).

1123221232100 is an abundant number, since it is smaller than the sum of its proper divisors (1556450580844).

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

1123221232100 is a wasteful number, since it uses less digits than its factorization.

1123221232100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19338 (or 19320 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1123221232100 its reverse (12321223211), we get a palindrome (1135542455311).

The spelling of 1123221232100 in words is "one trillion, one hundred twenty-three billion, two hundred twenty-one million, two hundred thirty-two thousand, one hundred".