212102121110111 has 4 divisors (see below), whose sum is σ = 217034728577832. Its totient is φ = 207169513642392.

The previous prime is 212102121110093. The next prime is 212102121110161. The reversal of 212102121110111 is 111011121201212.

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 212102121110111 - 2¹⁴ = 212102121093727 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 212102121110111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102121110161) 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, 2466303733796 + ... + 2466303733881.

It is an arithmetic number, because the mean of its divisors is an integer number (54258682144458).

Almost surely, 2^{212102121110111} is an apocalyptic number.

212102121110111 is a deficient number, since it is larger than the sum of its proper divisors (4932607467721).

212102121110111 is an equidigital number, since it uses as much as digits as its factorization.

212102121110111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4932607467720.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 212102121110111 its reverse (111011121201212), we get a palindrome (323113242311323).

The spelling of 212102121110111 in words is "two hundred twelve trillion, one hundred two billion, one hundred twenty-one million, one hundred ten thousand, one hundred eleven".