212112012111 has 24 divisors (see below), whose sum is σ = 301282368144. Its totient is φ = 132712673280.

The previous prime is 212112012089. The next prime is 212112012121. The reversal of 212112012111 is 111210211212.

It is a happy number.

It is not a de Polignac number, because 212112012111 - 2⁹ = 212112011599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112012121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40480 + ... + 652581.

It is an arithmetic number, because the mean of its divisors is an integer number (12553432006).

Almost surely, 2^212112012111 is an apocalyptic number.

212112012111 is a deficient number, since it is larger than the sum of its proper divisors (89170356033).

212112012111 is a wasteful number, since it uses less digits than its factorization.

212112012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693451 (or 693434 counting only the distinct ones).

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

Adding to 212112012111 its reverse (111210211212), we get a palindrome (323322223323).

The spelling of 212112012111 in words is "two hundred twelve billion, one hundred twelve million, twelve thousand, one hundred eleven".