1311113123 has 16 divisors (see below), whose sum is σ = 1340957376. Its totient is φ = 1281745920.

The previous prime is 1311113119. The next prime is 1311113161. The reversal of 1311113123 is 3213111131.

It is a cyclic number.

It is not a de Polignac number, because 1311113123 - 2² = 1311113119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311113173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4665743 + ... + 4666023.

It is an arithmetic number, because the mean of its divisors is an integer number (83809836).

Almost surely, 2^1311113123 is an apocalyptic number.

1311113123 is a deficient number, since it is larger than the sum of its proper divisors (29844253).

1311113123 is a wasteful number, since it uses less digits than its factorization.

1311113123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814.

The product of its digits is 54, while the sum is 17.

The square root of 1311113123 is about 36209.2960853977. The cubic root of 1311113123 is about 1094.4940075134.

Adding to 1311113123 its reverse (3213111131), we get a palindrome (4524224254).

The spelling of 1311113123 in words is "one billion, three hundred eleven million, one hundred thirteen thousand, one hundred twenty-three".