1111311205111 has 2 divisors, whose sum is σ = 1111311205112. Its totient is φ = 1111311205110.

The previous prime is 1111311205057. The next prime is 1111311205117. The reversal of 1111311205111 is 1115021131111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1111311205111 - 2²⁹ = 1110774334199 is a prime.

It is a super-2 number, since 2×1111311205111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111311205117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555655602555 + 555655602556.

It is an arithmetic number, because the mean of its divisors is an integer number (555655602556).

Almost surely, 2^{1111311205111} is an apocalyptic number.

1111311205111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111311205111 is an equidigital number, since it uses as much as digits as its factorization.

1111311205111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30, while the sum is 19.

Adding to 1111311205111 its reverse (1115021131111), we get a palindrome (2226332336222).

The spelling of 1111311205111 in words is "one trillion, one hundred eleven billion, three hundred eleven million, two hundred five thousand, one hundred eleven".