212112111 has 16 divisors (see below), whose sum is σ = 299980800. Its totient is φ = 132855168.

The previous prime is 212112091. The next prime is 212112161. The reversal of 212112111 is 111211212.

It is not a de Polignac number, because 212112111 - 2¹⁰ = 212111087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28210 + ... + 34928.

It is an arithmetic number, because the mean of its divisors is an integer number (18748800).

Almost surely, 2^212112111 is an apocalyptic number.

212112111 is a deficient number, since it is larger than the sum of its proper divisors (87868689).

212112111 is a wasteful number, since it uses less digits than its factorization.

212112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7358.

The product of its digits is 8, while the sum is 12.

The square root of 212112111 is about 14564.0691772595. The cubic root of 212112111 is about 596.3782854032.

Adding to 212112111 its reverse (111211212), we get a palindrome (323323323).

It can be divided in two parts, 21211211 and 1, that added together give a palindrome (21211212).

The spelling of 212112111 in words is "two hundred twelve million, one hundred twelve thousand, one hundred eleven".