1310311111111 has 4 divisors (see below), whose sum is σ = 1387388235312. Its totient is φ = 1233233986912.

The previous prime is 1310311111097. The next prime is 1310311111133. The reversal of 1310311111111 is 1111111130131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1310311111111 - 2⁵ = 1310311111079 is a prime.

It is a Duffinian number.

1310311111111 is a modest number, since divided by 1111111 gives 131031 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310311111171) 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, 38538562075 + ... + 38538562108.

It is an arithmetic number, because the mean of its divisors is an integer number (346847058828).

Almost surely, 2^{1310311111111} is an apocalyptic number.

1310311111111 is a deficient number, since it is larger than the sum of its proper divisors (77077124201).

1310311111111 is an equidigital number, since it uses as much as digits as its factorization.

1310311111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77077124200.

The product of its (nonzero) digits is 9, while the sum is 16.

Adding to 1310311111111 its reverse (1111111130131), we get a palindrome (2421422241242).

The spelling of 1310311111111 in words is "one trillion, three hundred ten billion, three hundred eleven million, one hundred eleven thousand, one hundred eleven".