13012131331 has 4 divisors (see below), whose sum is σ = 13012787200. Its totient is φ = 13011475464.

The previous prime is 13012131311. The next prime is 13012131371. The reversal of 13012131331 is 13313121031.

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

It is a cyclic number.

It is not a de Polignac number, because 13012131331 - 2⁹ = 13012130819 is a prime.

It is a super-2 number, since 2×13012131331² (a number of 21 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 = 13012131299 and 13012131308.

It is not an unprimeable number, because it can be changed into a prime (13012131311) 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, 297216 + ... + 338173.

It is an arithmetic number, because the mean of its divisors is an integer number (3253196800).

Almost surely, 2^13012131331 is an apocalyptic number.

13012131331 is a deficient number, since it is larger than the sum of its proper divisors (655869).

13012131331 is an equidigital number, since it uses as much as digits as its factorization.

13012131331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655868.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 13012131331 its reverse (13313121031), we get a palindrome (26325252362).

The spelling of 13012131331 in words is "thirteen billion, twelve million, one hundred thirty-one thousand, three hundred thirty-one".