1311131103 has 32 divisors (see below), whose sum is σ = 1899254016. Its totient is φ = 801335808.

The previous prime is 1311131089. The next prime is 1311131111. The reversal of 1311131103 is 3011311131.

It is not a de Polignac number, because 1311131103 - 2⁵ = 1311131071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311131153) 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 in 31 ways as a sum of consecutive naturals, for example, 1199025 + ... + 1200117.

It is an arithmetic number, because the mean of its divisors is an integer number (59351688).

Almost surely, 2^1311131103 is an apocalyptic number.

1311131103 is a deficient number, since it is larger than the sum of its proper divisors (588122913).

1311131103 is a wasteful number, since it uses less digits than its factorization.

1311131103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703.

The product of its (nonzero) digits is 27, while the sum is 15.

The square root of 1311131103 is about 36209.5443633305. The cubic root of 1311131103 is about 1094.4990106190.

Adding to 1311131103 its reverse (3011311131), we get a palindrome (4322442234).

The spelling of 1311131103 in words is "one billion, three hundred eleven million, one hundred thirty-one thousand, one hundred three".