212111021211 has 16 divisors (see below), whose sum is σ = 290681791008. Its totient is φ = 137479680000.

The previous prime is 212111021203. The next prime is 212111021219. The reversal of 212111021211 is 112120111212.

It is a happy number.

212111021211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212111021203) and next prime (212111021219).

It is not a de Polignac number, because 212111021211 - 2³ = 212111021203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212111021219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 589990 + ... + 878811.

It is an arithmetic number, because the mean of its divisors is an integer number (18167611938).

Almost surely, 2^212111021211 is an apocalyptic number.

212111021211 is a deficient number, since it is larger than the sum of its proper divisors (78570769797).

212111021211 is a wasteful number, since it uses less digits than its factorization.

212111021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470142.

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

Adding to 212111021211 its reverse (112120111212), we get a palindrome (324231132423).

Subtracting from 212111021211 its reverse (112120111212), we obtain a palindrome (99990909999).

The spelling of 212111021211 in words is "two hundred twelve billion, one hundred eleven million, twenty-one thousand, two hundred eleven".