13111231212031 has 8 divisors (see below), whose sum is σ = 13119345395984. Its totient is φ = 13103117616960.

The previous prime is 13111231211983. The next prime is 13111231212041. The reversal of 13111231212031 is 13021213211131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13111231212031 - 2²³ = 13111222823423 is a prime.

It is a super-3 number, since 3×13111231212031³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13111231211993 and 13111231212011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111231212041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49554211 + ... + 49818091.

It is an arithmetic number, because the mean of its divisors is an integer number (1639918174498).

Almost surely, 2^{13111231212031} is an apocalyptic number.

13111231212031 is a deficient number, since it is larger than the sum of its proper divisors (8114183953).

13111231212031 is a wasteful number, since it uses less digits than its factorization.

13111231212031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294441.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 13111231212031 its reverse (13021213211131), we get a palindrome (26132444423162).

Subtracting from 13111231212031 its reverse (13021213211131), we obtain a square (90018000900 = 300030²).

The spelling of 13111231212031 in words is "thirteen trillion, one hundred eleven billion, two hundred thirty-one million, two hundred twelve thousand, thirty-one".