212103211211 has 16 divisors (see below), whose sum is σ = 225105985440. Its totient is φ = 199159234560.

The previous prime is 212103211153. The next prime is 212103211223. The reversal of 212103211211 is 112112301212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212103211211 - 2⁶ = 212103211147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212103211211.

It is not an unprimeable number, because it can be changed into a prime (212103211811) 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 15 ways as a sum of consecutive naturals, for example, 33467435 + ... + 33473771.

It is an arithmetic number, because the mean of its divisors is an integer number (14069124090).

Almost surely, 2^212103211211 is an apocalyptic number.

212103211211 is a deficient number, since it is larger than the sum of its proper divisors (13002774229).

212103211211 is a wasteful number, since it uses less digits than its factorization.

212103211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10654.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 212103211211 its reverse (112112301212), we get a palindrome (324215512423).

Subtracting from 212103211211 its reverse (112112301212), we obtain a palindrome (99990909999).

The spelling of 212103211211 in words is "two hundred twelve billion, one hundred three million, two hundred eleven thousand, two hundred eleven".