211440454111 has 2 divisors, whose sum is σ = 211440454112. Its totient is φ = 211440454110.

The previous prime is 211440454097. The next prime is 211440454139. The reversal of 211440454111 is 111454044112.

It is an a-pointer prime, because the next prime (211440454139) can be obtained adding 211440454111 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211440454111 - 2¹¹ = 211440452063 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211440454111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211440454151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105720227055 + 105720227056.

It is an arithmetic number, because the mean of its divisors is an integer number (105720227056).

Almost surely, 2^211440454111 is an apocalyptic number.

211440454111 is a deficient number, since it is larger than the sum of its proper divisors (1).

211440454111 is an equidigital number, since it uses as much as digits as its factorization.

211440454111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 28.

Adding to 211440454111 its reverse (111454044112), we get a palindrome (322894498223).

The spelling of 211440454111 in words is "two hundred eleven billion, four hundred forty million, four hundred fifty-four thousand, one hundred eleven".