1123212312100 has 144 divisors (see below), whose sum is σ = 2512277703936. Its totient is φ = 435673728000.

The previous prime is 1123212312043. The next prime is 1123212312107. The reversal of 1123212312100 is 12132123211.

It is not an unprimeable number, because it can be changed into a prime (1123212312107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 231063670 + ... + 231068530.

It is an arithmetic number, because the mean of its divisors is an integer number (17446372944).

Almost surely, 2^{1123212312100} is an apocalyptic number.

1123212312100 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 1123212312100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1256138851968).

1123212312100 is an abundant number, since it is smaller than the sum of its proper divisors (1389065391836).

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

1123212312100 is a wasteful number, since it uses less digits than its factorization.

1123212312100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5366 (or 5359 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1123212312100 its reverse (12132123211), we get a palindrome (1135344435311).

The spelling of 1123212312100 in words is "one trillion, one hundred twenty-three billion, two hundred twelve million, three hundred twelve thousand, one hundred".