212313013243 has 4 divisors (see below), whose sum is σ = 224802014040. Its totient is φ = 199824012448.

The previous prime is 212313013229. The next prime is 212313013327. The reversal of 212313013243 is 342310313212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212313013243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212313013043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6244500373 + ... + 6244500406.

It is an arithmetic number, because the mean of its divisors is an integer number (56200503510).

Almost surely, 2^212313013243 is an apocalyptic number.

212313013243 is a deficient number, since it is larger than the sum of its proper divisors (12489000797).

212313013243 is a wasteful number, since it uses less digits than its factorization.

212313013243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12489000796.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 212313013243 its reverse (342310313212), we get a palindrome (554623326455).

The spelling of 212313013243 in words is "two hundred twelve billion, three hundred thirteen million, thirteen thousand, two hundred forty-three".