212318111 has 4 divisors (see below), whose sum is σ = 212480400. Its totient is φ = 212155824.

The previous prime is 212318069. The next prime is 212318137. The reversal of 212318111 is 111813212.

It is a happy number.

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-212318111 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 (212315111) 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, 79166 + ... + 81803.

It is an arithmetic number, because the mean of its divisors is an integer number (53120100).

Almost surely, 2^212318111 is an apocalyptic number.

212318111 is a deficient number, since it is larger than the sum of its proper divisors (162289).

212318111 is a wasteful number, since it uses less digits than its factorization.

212318111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162288.

The product of its digits is 96, while the sum is 20.

The square root of 212318111 is about 14571.1396603011. The cubic root of 212318111 is about 596.5712873907.

It can be divided in two parts, 21 and 2318111, that added together give a palindrome (2318132).

The spelling of 212318111 in words is "two hundred twelve million, three hundred eighteen thousand, one hundred eleven".