2112312100 has 72 divisors (see below), whose sum is σ = 4812192000. Its totient is φ = 803740800.

The previous prime is 2112312089. The next prime is 2112312107. The reversal of 2112312100 is 12132112.

It is not an unprimeable number, because it can be changed into a prime (2112312107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177126 + ... + 188674.

It is an arithmetic number, because the mean of its divisors is an integer number (66836000).

Almost surely, 2^2112312100 is an apocalyptic number.

2112312100 is a gapful number since it is divisible by the number (20) 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 2112312100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2406096000).

2112312100 is an abundant number, since it is smaller than the sum of its proper divisors (2699879900).

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

2112312100 is a wasteful number, since it uses less digits than its factorization.

2112312100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11653 (or 11646 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2112312100 is about 45959.8966491440. The cubic root of 2112312100 is about 1283.0769278416.

Adding to 2112312100 its reverse (12132112), we get a palindrome (2124444212).

The spelling of 2112312100 in words is "two billion, one hundred twelve million, three hundred twelve thousand, one hundred".