13221313331 has 8 divisors (see below), whose sum is σ = 13257174528. Its totient is φ = 13185477000.

The previous prime is 13221313279. The next prime is 13221313361. The reversal of 13221313331 is 13331312231.

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

It is a cyclic number.

It is not a de Polignac number, because 13221313331 - 2³⁰ = 12147571507 is a prime.

It is a super-3 number, since 3×13221313331³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13221313297 and 13221313306.

It is not an unprimeable number, because it can be changed into a prime (13221313361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1586666 + ... + 1594976.

It is an arithmetic number, because the mean of its divisors is an integer number (1657146816).

Almost surely, 2^13221313331 is an apocalyptic number.

13221313331 is a deficient number, since it is larger than the sum of its proper divisors (35861197).

13221313331 is an equidigital number, since it uses as much as digits as its factorization.

13221313331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12433.

The product of its digits is 972, while the sum is 23.

Adding to 13221313331 its reverse (13331312231), we get a palindrome (26552625562).

The spelling of 13221313331 in words is "thirteen billion, two hundred twenty-one million, three hundred thirteen thousand, three hundred thirty-one".