1311025103 has 2 divisors, whose sum is σ = 1311025104. Its totient is φ = 1311025102.

The previous prime is 1311025081. The next prime is 1311025141. The reversal of 1311025103 is 3015201131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311025103 - 2⁶ = 1311025039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311027103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655512551 + 655512552.

It is an arithmetic number, because the mean of its divisors is an integer number (655512552).

Almost surely, 2^1311025103 is an apocalyptic number.

1311025103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311025103 is an equidigital number, since it uses as much as digits as its factorization.

1311025103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1311025103 is about 36208.0806312624. The cubic root of 1311025103 is about 1094.4695144531.

Adding to 1311025103 its reverse (3015201131), we get a palindrome (4326226234).

The spelling of 1311025103 in words is "one billion, three hundred eleven million, twenty-five thousand, one hundred three".