11100121211 has 2 divisors, whose sum is σ = 11100121212. Its totient is φ = 11100121210.

The previous prime is 11100121187. The next prime is 11100121231. The reversal of 11100121211 is 11212100111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11100121211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11100121192 and 11100121201.

It is not a weakly prime, because it can be changed into another prime (11100121231) 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, 5550060605 + 5550060606.

It is an arithmetic number, because the mean of its divisors is an integer number (5550060606).

Almost surely, 2^11100121211 is an apocalyptic number.

11100121211 is a deficient number, since it is larger than the sum of its proper divisors (1).

11100121211 is an equidigital number, since it uses as much as digits as its factorization.

11100121211 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 11100121211 its reverse (11212100111), we get a palindrome (22312221322).

The spelling of 11100121211 in words is "eleven billion, one hundred million, one hundred twenty-one thousand, two hundred eleven".