211421340311 has 2 divisors, whose sum is σ = 211421340312. Its totient is φ = 211421340310.

The previous prime is 211421340289. The next prime is 211421340341. The reversal of 211421340311 is 113043124112.

211421340311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211421340311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211421340341) 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 as a sum of consecutive naturals, namely, 105710670155 + 105710670156.

It is an arithmetic number, because the mean of its divisors is an integer number (105710670156).

Almost surely, 2^211421340311 is an apocalyptic number.

211421340311 is a deficient number, since it is larger than the sum of its proper divisors (1).

211421340311 is an equidigital number, since it uses as much as digits as its factorization.

211421340311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 211421340311 its reverse (113043124112), we get a palindrome (324464464423).

The spelling of 211421340311 in words is "two hundred eleven billion, four hundred twenty-one million, three hundred forty thousand, three hundred eleven".