212112021122111 has 64 divisors (see below), whose sum is σ = 237681510700032. Its totient is φ = 187672464000000.

The previous prime is 212112021122107. The next prime is 212112021122123. The reversal of 212112021122111 is 111221120211212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212112021122111 - 2² = 212112021122107 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 (212112020122111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 42998582801 + ... + 42998587733.

It is an arithmetic number, because the mean of its divisors is an integer number (3713773604688).

Almost surely, 2^{212112021122111} is an apocalyptic number.

212112021122111 is a deficient number, since it is larger than the sum of its proper divisors (25569489577921).

212112021122111 is a wasteful number, since it uses less digits than its factorization.

212112021122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6624.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 212112021122111 its reverse (111221120211212), we get a palindrome (323333141333323).

The spelling of 212112021122111 in words is "two hundred twelve trillion, one hundred twelve billion, twenty-one million, one hundred twenty-two thousand, one hundred eleven".