212323331111 has 4 divisors (see below), whose sum is σ = 216329431752. Its totient is φ = 208317230472.

The previous prime is 212323331069. The next prime is 212323331161. The reversal of 212323331111 is 111133323212.

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-212323331111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212323331161) 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, 2003050241 + ... + 2003050346.

It is an arithmetic number, because the mean of its divisors is an integer number (54082357938).

Almost surely, 2^212323331111 is an apocalyptic number.

212323331111 is a deficient number, since it is larger than the sum of its proper divisors (4006100641).

212323331111 is an equidigital number, since it uses as much as digits as its factorization.

212323331111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4006100640.

The product of its digits is 648, while the sum is 23.

Adding to 212323331111 its reverse (111133323212), we get a palindrome (323456654323).

The spelling of 212323331111 in words is "two hundred twelve billion, three hundred twenty-three million, three hundred thirty-one thousand, one hundred eleven".