13111231203031 has 4 divisors (see below), whose sum is σ = 14119787449432. Its totient is φ = 12102674956632.

The previous prime is 13111231203029. The next prime is 13111231203067. The reversal of 13111231203031 is 13030213211131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13111231203031 - 2¹ = 13111231203029 is a prime.

It is a super-2 number, since 2×13111231203031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13111231202993 and 13111231203011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111231203001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504278123181 + ... + 504278123206.

It is an arithmetic number, because the mean of its divisors is an integer number (3529946862358).

Almost surely, 2^{13111231203031} is an apocalyptic number.

13111231203031 is a deficient number, since it is larger than the sum of its proper divisors (1008556246401).

13111231203031 is a wasteful number, since it uses less digits than its factorization.

13111231203031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008556246400.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 13111231203031 its reverse (13030213211131), we get a palindrome (26141444414162).

The spelling of 13111231203031 in words is "thirteen trillion, one hundred eleven billion, two hundred thirty-one million, two hundred three thousand, thirty-one".