11011220111 has 2 divisors, whose sum is σ = 11011220112. Its totient is φ = 11011220110.

The previous prime is 11011220071. The next prime is 11011220131. The reversal of 11011220111 is 11102211011.

It is a strong prime.

It is an emirp because it is prime and its reverse (11102211011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11011220111 - 2²² = 11007025807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11011220092 and 11011220101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11011220131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505610055 + 5505610056.

It is an arithmetic number, because the mean of its divisors is an integer number (5505610056).

Almost surely, 2^11011220111 is an apocalyptic number.

11011220111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011220111 is an equidigital number, since it uses as much as digits as its factorization.

11011220111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11011220111 its reverse (11102211011), we get a palindrome (22113431122).

The spelling of 11011220111 in words is "eleven billion, eleven million, two hundred twenty thousand, one hundred eleven".