1311111013 has 4 divisors (see below), whose sum is σ = 1339007040. Its totient is φ = 1283214988.

The previous prime is 1311110987. The next prime is 1311111029. The reversal of 1311111013 is 3101111131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311111013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311110984 and 1311111002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311111313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13947943 + ... + 13948036.

It is an arithmetic number, because the mean of its divisors is an integer number (334751760).

Almost surely, 2^1311111013 is an apocalyptic number.

It is an amenable number.

1311111013 is a deficient number, since it is larger than the sum of its proper divisors (27896027).

1311111013 is an equidigital number, since it uses as much as digits as its factorization.

1311111013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27896026.

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

The square root of 1311111013 is about 36209.2669492217. The cubic root of 1311111013 is about 1094.4934203829.

Adding to 1311111013 its reverse (3101111131), we get a palindrome (4412222144).

The spelling of 1311111013 in words is "one billion, three hundred eleven million, one hundred eleven thousand, thirteen".