13111431554331 has 24 divisors (see below), whose sum is σ = 20951429690880. Its totient is φ = 7834402119600.

The previous prime is 13111431554323. The next prime is 13111431554461. The reversal of 13111431554331 is 13345513411131.

13111431554331 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 1 + 4 + 315 + 5 + 4 + 331 = 666.

It is not a de Polignac number, because 13111431554331 - 2³ = 13111431554323 is a prime.

It is a super-3 number, since 3×13111431554331³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (13111431554321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 932659891 + ... + 932673948.

It is an arithmetic number, because the mean of its divisors is an integer number (872976237120).

Almost surely, 2^{13111431554331} is an apocalyptic number.

13111431554331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13111431554331 is a deficient number, since it is larger than the sum of its proper divisors (7839998136549).

13111431554331 is a wasteful number, since it uses less digits than its factorization.

13111431554331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865333927 (or 1865333924 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

Adding to 13111431554331 its reverse (13345513411131), we get a palindrome (26456944965462).

The spelling of 13111431554331 in words is "thirteen trillion, one hundred eleven billion, four hundred thirty-one million, five hundred fifty-four thousand, three hundred thirty-one".