212131431243 has 12 divisors (see below), whose sum is σ = 306475952328. Its totient is φ = 141391468800.

The previous prime is 212131431217. The next prime is 212131431247. The reversal of 212131431243 is 342134131212.

212131431243 is a `hidden beast` number, since 212 + 13 + 1 + 431 + 2 + 4 + 3 = 666.

It is not a de Polignac number, because 212131431243 - 2⁶ = 212131431179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212131431247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2411505 + ... + 2497922.

It is an arithmetic number, because the mean of its divisors is an integer number (25539662694).

Almost surely, 2^212131431243 is an apocalyptic number.

212131431243 is a deficient number, since it is larger than the sum of its proper divisors (94344521085).

212131431243 is a wasteful number, since it uses less digits than its factorization.

212131431243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4914234 (or 4914231 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 212131431243 its reverse (342134131212), we get a palindrome (554265562455).

The spelling of 212131431243 in words is "two hundred twelve billion, one hundred thirty-one million, four hundred thirty-one thousand, two hundred forty-three".