212102111 has 8 divisors (see below), whose sum is σ = 240439920. Its totient is φ = 185481792.

The previous prime is 212102089. The next prime is 212102153. The reversal of 212102111 is 111201212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212102111 - 2¹⁸ = 211839967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212102092 and 212102101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102161) 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 7 ways as a sum of consecutive naturals, for example, 429110 + ... + 429603.

It is an arithmetic number, because the mean of its divisors is an integer number (30054990).

Almost surely, 2^212102111 is an apocalyptic number.

212102111 is a deficient number, since it is larger than the sum of its proper divisors (28337809).

212102111 is a wasteful number, since it uses less digits than its factorization.

212102111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858745.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 212102111 is about 14563.7258625669. The cubic root of 212102111 is about 596.3689131950.

Adding to 212102111 its reverse (111201212), we get a palindrome (323303323).

The spelling of 212102111 in words is "two hundred twelve million, one hundred two thousand, one hundred eleven".