213123221231112 has 96 divisors (see below), whose sum is σ = 587001096396000. Its totient is φ = 69835896337920.

The previous prime is 213123221231111. The next prime is 213123221231201. The reversal of 213123221231112 is 211132122321312.

213123221231112 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 2 + 322 + 12 + 311 + 12 = 666.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (213123221231111) 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, 298230787 + ... + 298944557.

It is an arithmetic number, because the mean of its divisors is an integer number (6114594754125).

Almost surely, 2^{213123221231112} is an apocalyptic number.

It is an amenable number.

213123221231112 is an abundant number, since it is smaller than the sum of its proper divisors (373877875164888).

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

213123221231112 is a wasteful number, since it uses less digits than its factorization.

213123221231112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784131 (or 784124 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

Adding to 213123221231112 its reverse (211132122321312), we get a palindrome (424255343552424).

The spelling of 213123221231112 in words is "two hundred thirteen trillion, one hundred twenty-three billion, two hundred twenty-one million, two hundred thirty-one thousand, one hundred twelve".