13113312231 has 4 divisors (see below), whose sum is σ = 17484416312. Its totient is φ = 8742208152.

The previous prime is 13113312217. The next prime is 13113312257. The reversal of 13113312231 is 13221331131.

It is a happy number.

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

It is not a de Polignac number, because 13113312231 - 2⁶ = 13113312167 is a prime.

It is a super-2 number, since 2×13113312231² (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 = 13113312198 and 13113312207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13113312031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2185552036 + ... + 2185552041.

It is an arithmetic number, because the mean of its divisors is an integer number (4371104078).

Almost surely, 2^13113312231 is an apocalyptic number.

13113312231 is a deficient number, since it is larger than the sum of its proper divisors (4371104081).

13113312231 is an equidigital number, since it uses as much as digits as its factorization.

13113312231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4371104080.

The product of its digits is 324, while the sum is 21.

Adding to 13113312231 its reverse (13221331131), we get a palindrome (26334643362).

The spelling of 13113312231 in words is "thirteen billion, one hundred thirteen million, three hundred twelve thousand, two hundred thirty-one".