212110211111 has 4 divisors (see below), whose sum is σ = 214493472000. Its totient is φ = 209726950224.

The previous prime is 212110211107. The next prime is 212110211113. The reversal of 212110211111 is 111112011212.

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 212110211111 - 2² = 212110211107 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 (212110211113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1191630311 + ... + 1191630488.

It is an arithmetic number, because the mean of its divisors is an integer number (53623368000).

Almost surely, 2^212110211111 is an apocalyptic number.

212110211111 is a deficient number, since it is larger than the sum of its proper divisors (2383260889).

212110211111 is an equidigital number, since it uses as much as digits as its factorization.

212110211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2383260888.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 212110211111 its reverse (111112011212), we get a palindrome (323222222323).

The spelling of 212110211111 in words is "two hundred twelve billion, one hundred ten million, two hundred eleven thousand, one hundred eleven".