212001111211 has 4 divisors (see below), whose sum is σ = 212015713312. Its totient is φ = 211986509112.

The previous prime is 212001111197. The next prime is 212001111221. The reversal of 212001111211 is 112111100212.

It is a happy number.

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 212001111211 - 2¹¹ = 212001109163 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212001111191 and 212001111200.

It is not an unprimeable number, because it can be changed into a prime (212001111221) 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 3 ways as a sum of consecutive naturals, for example, 7279251 + ... + 7308316.

It is an arithmetic number, because the mean of its divisors is an integer number (53003928328).

Almost surely, 2^212001111211 is an apocalyptic number.

212001111211 is a deficient number, since it is larger than the sum of its proper divisors (14602101).

212001111211 is a wasteful number, since it uses less digits than its factorization.

212001111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14602100.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 212001111211 its reverse (112111100212), we get a palindrome (324112211423).

The spelling of 212001111211 in words is "two hundred twelve billion, one million, one hundred eleven thousand, two hundred eleven".