11111110211 has 2 divisors, whose sum is σ = 11111110212. Its totient is φ = 11111110210.

The previous prime is 11111110207. The next prime is 11111110237. The reversal of 11111110211 is 11201111111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11111110211 - 2² = 11111110207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111110192 and 11111110201.

It is not a weakly prime, because it can be changed into another prime (11111110201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555555105 + 5555555106.

It is an arithmetic number, because the mean of its divisors is an integer number (5555555106).

Almost surely, 2^11111110211 is an apocalyptic number.

11111110211 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111110211 is an equidigital number, since it uses as much as digits as its factorization.

11111110211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 11111110211 its reverse (11201111111), we get a palindrome (22312221322).

The spelling of 11111110211 in words is "eleven billion, one hundred eleven million, one hundred ten thousand, two hundred eleven".