1311041011 has 8 divisors (see below), whose sum is σ = 1528911200. Its totient is φ = 1123749144.

The previous prime is 1311040993. The next prime is 1311041023. The reversal of 1311041011 is 1101401131.

It is a happy number.

It is not a de Polignac number, because 1311041011 - 2⁵ = 1311040979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311040982 and 1311041000.

It is not an unprimeable number, because it can be changed into a prime (1311081011) 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 7 ways as a sum of consecutive naturals, for example, 1910796 + ... + 1911481.

It is an arithmetic number, because the mean of its divisors is an integer number (191113900).

Almost surely, 2^1311041011 is an apocalyptic number.

1311041011 is a deficient number, since it is larger than the sum of its proper divisors (217870189).

1311041011 is an frugal number, since it uses more digits than its factorization.

1311041011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3822298 (or 3822284 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1311041011 is about 36208.3003053167. The cubic root of 1311041011 is about 1094.4739412055.

Adding to 1311041011 its reverse (1101401131), we get a palindrome (2412442142).

The spelling of 1311041011 in words is "one billion, three hundred eleven million, forty-one thousand, eleven".