1111131281111 has 2 divisors, whose sum is σ = 1111131281112. Its totient is φ = 1111131281110.

The previous prime is 1111131281101. The next prime is 1111131281159. The reversal of 1111131281111 is 1111821311111.

It is a m-pointer prime, because the next prime (1111131281159) can be obtained adding 1111131281111 to its product of digits (48).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111131281111 is a prime.

It is a super-2 number, since 2×1111131281111² (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 (1111131281101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555565640555 + 555565640556.

It is an arithmetic number, because the mean of its divisors is an integer number (555565640556).

Almost surely, 2^{1111131281111} is an apocalyptic number.

1111131281111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111131281111 is an equidigital number, since it uses as much as digits as its factorization.

1111131281111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48, while the sum is 23.

Adding to 1111131281111 its reverse (1111821311111), we get a palindrome (2222952592222).

The spelling of 1111131281111 in words is "one trillion, one hundred eleven billion, one hundred thirty-one million, two hundred eighty-one thousand, one hundred eleven".