1101111111211 has 2 divisors, whose sum is σ = 1101111111212. Its totient is φ = 1101111111210.

The previous prime is 1101111111209. The next prime is 1101111111223. The reversal of 1101111111211 is 1121111111011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1101111111211 - 2¹ = 1101111111209 is a prime.

Together with 1101111111209, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1101111111191 and 1101111111200.

It is not a weakly prime, because it can be changed into another prime (1101111111241) 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, 550555555605 + 550555555606.

It is an arithmetic number, because the mean of its divisors is an integer number (550555555606).

Almost surely, 2^{1101111111211} is an apocalyptic number.

1101111111211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101111111211 is an equidigital number, since it uses as much as digits as its factorization.

1101111111211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 13.

Adding to 1101111111211 its reverse (1121111111011), we get a palindrome (2222222222222).

The spelling of 1101111111211 in words is "one trillion, one hundred one billion, one hundred eleven million, one hundred eleven thousand, two hundred eleven".