1311111103 has 2 divisors, whose sum is σ = 1311111104. Its totient is φ = 1311111102.

The previous prime is 1311111101. The next prime is 1311111119. The reversal of 1311111103 is 3011111131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311111103 - 2¹ = 1311111101 is a prime.

Together with 1311111101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311111101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655555551 + 655555552.

It is an arithmetic number, because the mean of its divisors is an integer number (655555552).

Almost surely, 2^1311111103 is an apocalyptic number.

1311111103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311111103 is an equidigital number, since it uses as much as digits as its factorization.

1311111103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9, while the sum is 13.

The square root of 1311111103 is about 36209.2681919975. The cubic root of 1311111103 is about 1094.4934454264.

Adding to 1311111103 its reverse (3011111131), we get a palindrome (4322222234).

The spelling of 1311111103 in words is "one billion, three hundred eleven million, one hundred eleven thousand, one hundred three".