11311331213 has 16 divisors (see below), whose sum is σ = 14129431680. Its totient is φ = 8816043456.

The previous prime is 11311331209. The next prime is 11311331221. The reversal of 11311331213 is 31213311311.

11311331213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11311331213 - 2² = 11311331209 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311331233) 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 15 ways as a sum of consecutive naturals, for example, 921518 + ... + 933711.

It is an arithmetic number, because the mean of its divisors is an integer number (883089480).

Almost surely, 2^11311331213 is an apocalyptic number.

11311331213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11311331213 is a deficient number, since it is larger than the sum of its proper divisors (2818100467).

11311331213 is a wasteful number, since it uses less digits than its factorization.

11311331213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855316.

The product of its digits is 162, while the sum is 20.

Adding to 11311331213 its reverse (31213311311), we get a palindrome (42524642524).

The spelling of 11311331213 in words is "eleven billion, three hundred eleven million, three hundred thirty-one thousand, two hundred thirteen".