1111312311 has 4 divisors (see below), whose sum is σ = 1481749752. Its totient is φ = 740874872.

The previous prime is 1111312303. The next prime is 1111312343. The reversal of 1111312311 is 1132131111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1132131111 = 3 ⋅377377037.

It is a cyclic number.

It is not a de Polignac number, because 1111312311 - 2³ = 1111312303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111312351) 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 3 ways as a sum of consecutive naturals, for example, 185218716 + ... + 185218721.

It is an arithmetic number, because the mean of its divisors is an integer number (370437438).

Almost surely, 2^1111312311 is an apocalyptic number.

1111312311 is a deficient number, since it is larger than the sum of its proper divisors (370437441).

1111312311 is an equidigital number, since it uses as much as digits as its factorization.

1111312311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370437440.

The product of its digits is 18, while the sum is 15.

The square root of 1111312311 is about 33336.3511950543. The cubic root of 1111312311 is about 1035.8066823616.

Adding to 1111312311 its reverse (1132131111), we get a palindrome (2243443422).

The spelling of 1111312311 in words is "one billion, one hundred eleven million, three hundred twelve thousand, three hundred eleven".