1111112611111 has 2 divisors, whose sum is σ = 1111112611112. Its totient is φ = 1111112611110.

The previous prime is 1111112611079. The next prime is 1111112611123. The reversal of 1111112611111 is 1111162111111.

It is a m-pointer prime, because the next prime (1111112611123) can be obtained adding 1111112611111 to its product of digits (12).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1111112611111 - 2⁵ = 1111112611079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111112611711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555556305555 + 555556305556.

It is an arithmetic number, because the mean of its divisors is an integer number (555556305556).

Almost surely, 2^{1111112611111} is an apocalyptic number.

1111112611111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111112611111 is an equidigital number, since it uses as much as digits as its factorization.

1111112611111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12, while the sum is 19.

Adding to 1111112611111 its reverse (1111162111111), we get a palindrome (2222274722222).

The spelling of 1111112611111 in words is "one trillion, one hundred eleven billion, one hundred twelve million, six hundred eleven thousand, one hundred eleven".