212123140112 has 80 divisors (see below), whose sum is σ = 448958264832. Its totient is φ = 96505344000.

The previous prime is 212123140111. The next prime is 212123140153. The reversal of 212123140112 is 211041321212.

It is not an unprimeable number, because it can be changed into a prime (212123140111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5043233 + ... + 5085119.

Almost surely, 2^212123140112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212123140112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224479132416).

212123140112 is an abundant number, since it is smaller than the sum of its proper divisors (236835124720).

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

212123140112 is a wasteful number, since it uses less digits than its factorization.

212123140112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42256 (or 42250 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 212123140112 its reverse (211041321212), we get a palindrome (423164461324).

The spelling of 212123140112 in words is "two hundred twelve billion, one hundred twenty-three million, one hundred forty thousand, one hundred twelve".