212111202111 has 4 divisors (see below), whose sum is σ = 282814936152. Its totient is φ = 141407468072.

The previous prime is 212111202103. The next prime is 212111202119. The reversal of 212111202111 is 111202111212.

It is a happy number.

212111202111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (212111202103) and next prime (212111202119).

It is a cyclic number.

It is not a de Polignac number, because 212111202111 - 2³ = 212111202103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111202119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35351867016 + ... + 35351867021.

It is an arithmetic number, because the mean of its divisors is an integer number (70703734038).

Almost surely, 2^212111202111 is an apocalyptic number.

212111202111 is a deficient number, since it is larger than the sum of its proper divisors (70703734041).

212111202111 is an equidigital number, since it uses as much as digits as its factorization.

212111202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70703734040.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 212111202111 its reverse (111202111212), we get a palindrome (323313313323).

It can be divided in two parts, 212 and 111202111, that multiplied together give a palindrome (23574847532).

The spelling of 212111202111 in words is "two hundred twelve billion, one hundred eleven million, two hundred two thousand, one hundred eleven".