11201111 has 2 divisors, whose sum is σ = 11201112. Its totient is φ = 11201110.

The previous prime is 11201107. The next prime is 11201117. The reversal of 11201111 is 11110211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11201111 - 2² = 11201107 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11201117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5600555 + 5600556.

It is an arithmetic number, because the mean of its divisors is an integer number (5600556).

Almost surely, 2^11201111 is an apocalyptic number.

11201111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11201111 is an equidigital number, since it uses as much as digits as its factorization.

11201111 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 8.

The square root of 11201111 is about 3346.8060893933. The cubic root of 11201111 is about 223.7451861682.

Adding to 11201111 its reverse (11110211), we get a palindrome (22311322).

The spelling of 11201111 in words is "eleven million, two hundred one thousand, one hundred eleven".