212543345211 has 4 divisors (see below), whose sum is σ = 283391126952. Its totient is φ = 141695563472.

The previous prime is 212543345191. The next prime is 212543345227. The reversal of 212543345211 is 112543345212.

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-212543345211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212543345251) 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, 35423890866 + ... + 35423890871.

It is an arithmetic number, because the mean of its divisors is an integer number (70847781738).

Almost surely, 2^212543345211 is an apocalyptic number.

212543345211 is a deficient number, since it is larger than the sum of its proper divisors (70847781741).

212543345211 is an equidigital number, since it uses as much as digits as its factorization.

212543345211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70847781740.

The product of its digits is 28800, while the sum is 33.

Subtracting from 212543345211 its reverse (112543345212), we obtain a palindrome (99999999999).

The spelling of 212543345211 in words is "two hundred twelve billion, five hundred forty-three million, three hundred forty-five thousand, two hundred eleven".