211021212011 has 2 divisors, whose sum is σ = 211021212012. Its totient is φ = 211021212010.

The previous prime is 211021211981. The next prime is 211021212013. The reversal of 211021212011 is 110212120112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211021212011 is a prime.

Together with 211021212013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211021212013) 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 as a sum of consecutive naturals, namely, 105510606005 + 105510606006.

It is an arithmetic number, because the mean of its divisors is an integer number (105510606006).

Almost surely, 2^211021212011 is an apocalyptic number.

211021212011 is a deficient number, since it is larger than the sum of its proper divisors (1).

211021212011 is an equidigital number, since it uses as much as digits as its factorization.

211021212011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211021212011 its reverse (110212120112), we get a palindrome (321233332123).

It can be divided in two parts, 2 and 11021212011, that multiplied together give a palindrome (22042424022).

The spelling of 211021212011 in words is "two hundred eleven billion, twenty-one million, two hundred twelve thousand, eleven".