2112321131100 has 216 divisors, whose sum is σ = 6848833052880. Its totient is φ = 544117616640.

The previous prime is 2112321130963. The next prime is 2112321131101. The reversal of 2112321131100 is 11311232112.

2112321131100 is a `hidden beast` number, since 2 + 112 + 321 + 131 + 100 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112321131101) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4400524 + ... + 4856876.

It is an arithmetic number, because the mean of its divisors is an integer number (31707560430).

Almost surely, 2^{2112321131100} is an apocalyptic number.

2112321131100 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 2112321131100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3424416526440).

2112321131100 is an abundant number, since it is smaller than the sum of its proper divisors (4736511921780).

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

2112321131100 is a wasteful number, since it uses less digits than its factorization.

2112321131100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456549 (or 456539 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 2112321131100 its reverse (11311232112), we get a palindrome (2123632363212).

The spelling of 2112321131100 in words is "two trillion, one hundred twelve billion, three hundred twenty-one million, one hundred thirty-one thousand, one hundred".