212021122111211 has 12 divisors (see below), whose sum is σ = 246637094183568. Its totient is φ = 181732185047952.

The previous prime is 212021122111109. The next prime is 212021122111217. The reversal of 212021122111211 is 112111221120212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-212021122111211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212021122111217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55003625 + ... + 58731941.

It is an arithmetic number, because the mean of its divisors is an integer number (20553091181964).

Almost surely, 2^{212021122111211} is an apocalyptic number.

212021122111211 is a deficient number, since it is larger than the sum of its proper divisors (34615972072357).

212021122111211 is a wasteful number, since it uses less digits than its factorization.

212021122111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4888898 (or 4888891 counting only the distinct ones).

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

Adding to 212021122111211 its reverse (112111221120212), we get a palindrome (324132343231423).

Subtracting from 212021122111211 its reverse (112111221120212), we obtain a palindrome (99909900990999).

The spelling of 212021122111211 in words is "two hundred twelve trillion, twenty-one billion, one hundred twenty-two million, one hundred eleven thousand, two hundred eleven".