212423231142 has 48 divisors (see below), whose sum is σ = 466356150000. Its totient is φ = 69871583232.

The previous prime is 212423231099. The next prime is 212423231183. The reversal of 212423231142 is 241132324212.

212423231142 is a `hidden beast` number, since 2 + 1 + 2 + 423 + 231 + 1 + 4 + 2 = 666.

212423231142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 666534 + ... + 932262.

It is an arithmetic number, because the mean of its divisors is an integer number (9715753125).

Almost surely, 2^212423231142 is an apocalyptic number.

212423231142 is an abundant number, since it is smaller than the sum of its proper divisors (253932918858).

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

212423231142 is a wasteful number, since it uses less digits than its factorization.

212423231142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266325 (or 266322 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 212423231142 its reverse (241132324212), we get a palindrome (453555555354).

The spelling of 212423231142 in words is "two hundred twelve billion, four hundred twenty-three million, two hundred thirty-one thousand, one hundred forty-two".