212012330111 has 4 divisors (see below), whose sum is σ = 214070702352. Its totient is φ = 209953957872.

The previous prime is 212012330107. The next prime is 212012330171. The reversal of 212012330111 is 111033210212.

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 212012330111 - 2² = 212012330107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212012330111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012330171) 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, 1029185966 + ... + 1029186171.

It is an arithmetic number, because the mean of its divisors is an integer number (53517675588).

Almost surely, 2^212012330111 is an apocalyptic number.

212012330111 is a deficient number, since it is larger than the sum of its proper divisors (2058372241).

212012330111 is a wasteful number, since it uses less digits than its factorization.

212012330111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058372240.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 212012330111 its reverse (111033210212), we get a palindrome (323045540323).

The spelling of 212012330111 in words is "two hundred twelve billion, twelve million, three hundred thirty thousand, one hundred eleven".