13231021311 has 24 divisors (see below), whose sum is σ = 19352938176. Its totient is φ = 8709710400.

The previous prime is 13231021303. The next prime is 13231021369. The reversal of 13231021311 is 11312013231.

13231021311 is a `hidden beast` number, since 1 + 323 + 10 + 21 + 311 = 666.

It is not a de Polignac number, because 13231021311 - 2³ = 13231021303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231021301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 319546 + ... + 358568.

It is an arithmetic number, because the mean of its divisors is an integer number (806372424).

Almost surely, 2^13231021311 is an apocalyptic number.

13231021311 is a deficient number, since it is larger than the sum of its proper divisors (6121916865).

13231021311 is a wasteful number, since it uses less digits than its factorization.

13231021311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39503 (or 39500 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 13231021311 its reverse (11312013231), we get a palindrome (24543034542).

The spelling of 13231021311 in words is "thirteen billion, two hundred thirty-one million, twenty-one thousand, three hundred eleven".