1311011011 has 4 divisors (see below), whose sum is σ = 1311700392. Its totient is φ = 1310321632.

The previous prime is 1311011003. The next prime is 1311011069. The reversal of 1311011011 is 1101101131.

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 1311011011 - 2³ = 1311011003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311011071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341830 + ... + 345643.

It is an arithmetic number, because the mean of its divisors is an integer number (327925098).

Almost surely, 2^1311011011 is an apocalyptic number.

1311011011 is a deficient number, since it is larger than the sum of its proper divisors (689381).

1311011011 is an equidigital number, since it uses as much as digits as its factorization.

1311011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689380.

The product of its (nonzero) digits is 3, while the sum is 10.

The square root of 1311011011 is about 36207.8860332939. The cubic root of 1311011011 is about 1094.4655930129.

Adding to 1311011011 its reverse (1101101131), we get a palindrome (2412112142).

The spelling of 1311011011 in words is "one billion, three hundred eleven million, eleven thousand, eleven".