212431320243 has 12 divisors (see below), whose sum is σ = 308540520288. Its totient is φ = 140838443280.

The previous prime is 212431320203. The next prime is 212431320253. The reversal of 212431320243 is 342023134212.

212431320243 is a `hidden beast` number, since 21 + 2 + 431 + 3 + 202 + 4 + 3 = 666.

It is not a de Polignac number, because 212431320243 - 2¹² = 212431316147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212431320203) 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, 65201355 + ... + 65204612.

It is an arithmetic number, because the mean of its divisors is an integer number (25711710024).

Almost surely, 2^212431320243 is an apocalyptic number.

212431320243 is a deficient number, since it is larger than the sum of its proper divisors (96109200045).

212431320243 is a wasteful number, since it uses less digits than its factorization.

212431320243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130406154 (or 130406151 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 212431320243 its reverse (342023134212), we get a palindrome (554454454455).

The spelling of 212431320243 in words is "two hundred twelve billion, four hundred thirty-one million, three hundred twenty thousand, two hundred forty-three".