13321031331 has 4 divisors (see below), whose sum is σ = 17761375112. Its totient is φ = 8880687552.

The previous prime is 13321031327. The next prime is 13321031341. The reversal of 13321031331 is 13313012331.

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

It is not a de Polignac number, because 13321031331 - 2² = 13321031327 is a prime.

It is a super-2 number, since 2×13321031331² (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 = 13321031298 and 13321031307.

It is not an unprimeable number, because it can be changed into a prime (13321031341) 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, 2220171886 + ... + 2220171891.

It is an arithmetic number, because the mean of its divisors is an integer number (4440343778).

Almost surely, 2^13321031331 is an apocalyptic number.

13321031331 is a deficient number, since it is larger than the sum of its proper divisors (4440343781).

13321031331 is an equidigital number, since it uses as much as digits as its factorization.

13321031331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4440343780.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 13321031331 its reverse (13313012331), we get a palindrome (26634043662).

The spelling of 13321031331 in words is "thirteen billion, three hundred twenty-one million, thirty-one thousand, three hundred thirty-one".