13221131345 has 8 divisors (see below), whose sum is σ = 15913291200. Its totient is φ = 10544949360.

The previous prime is 13221131281. The next prime is 13221131359. The reversal of 13221131345 is 54313112231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13221131345 - 2⁶ = 13221131281 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3992645 + ... + 3995954.

It is an arithmetic number, because the mean of its divisors is an integer number (1989161400).

Almost surely, 2^13221131345 is an apocalyptic number.

It is an amenable number.

13221131345 is a deficient number, since it is larger than the sum of its proper divisors (2692159855).

13221131345 is an equidigital number, since it uses as much as digits as its factorization.

13221131345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7988935.

The product of its digits is 2160, while the sum is 26.

Adding to 13221131345 its reverse (54313112231), we get a palindrome (67534243576).

The spelling of 13221131345 in words is "thirteen billion, two hundred twenty-one million, one hundred thirty-one thousand, three hundred forty-five".