212023231111 has 4 divisors (see below), whose sum is σ = 212312485912. Its totient is φ = 211733976312.

The previous prime is 212023231109. The next prime is 212023231159. The reversal of 212023231111 is 111132320212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212023231111 - 2¹ = 212023231109 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 (212023231171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144626301 + ... + 144627766.

It is an arithmetic number, because the mean of its divisors is an integer number (53078121478).

Almost surely, 2^212023231111 is an apocalyptic number.

212023231111 is a deficient number, since it is larger than the sum of its proper divisors (289254801).

212023231111 is an equidigital number, since it uses as much as digits as its factorization.

212023231111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289254800.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 212023231111 its reverse (111132320212), we get a palindrome (323155551323).

The spelling of 212023231111 in words is "two hundred twelve billion, twenty-three million, two hundred thirty-one thousand, one hundred eleven".