13112231318 has 4 divisors (see below), whose sum is σ = 19668346980. Its totient is φ = 6556115658.

The previous prime is 13112231317. The next prime is 13112231381. The reversal of 13112231318 is 81313221131.

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

It is a super-2 number, since 2×13112231318² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13112231317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3278057828 + ... + 3278057831.

It is an arithmetic number, because the mean of its divisors is an integer number (4917086745).

Almost surely, 2^13112231318 is an apocalyptic number.

13112231318 is a deficient number, since it is larger than the sum of its proper divisors (6556115662).

13112231318 is an equidigital number, since it uses as much as digits as its factorization.

13112231318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6556115661.

The product of its digits is 864, while the sum is 26.

Adding to 13112231318 its reverse (81313221131), we get a palindrome (94425452449).

The spelling of 13112231318 in words is "thirteen billion, one hundred twelve million, two hundred thirty-one thousand, three hundred eighteen".