212313111211 has 4 divisors (see below), whose sum is σ = 213037729632. Its totient is φ = 211588492792.

The previous prime is 212313111203. The next prime is 212313111221. The reversal of 212313111211 is 112111313212.

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

It is a cyclic number.

It is not a de Polignac number, because 212313111211 - 2³ = 212313111203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212313111221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362308771 + ... + 362309356.

It is an arithmetic number, because the mean of its divisors is an integer number (53259432408).

Almost surely, 2^212313111211 is an apocalyptic number.

212313111211 is a deficient number, since it is larger than the sum of its proper divisors (724618421).

212313111211 is an equidigital number, since it uses as much as digits as its factorization.

212313111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724618420.

The product of its digits is 72, while the sum is 19.

Adding to 212313111211 its reverse (112111313212), we get a palindrome (324424424423).

The spelling of 212313111211 in words is "two hundred twelve billion, three hundred thirteen million, one hundred eleven thousand, two hundred eleven".