13033313221 has 6 divisors (see below), whose sum is σ = 13230748230. Its totient is φ = 12838781736.

The previous prime is 13033313219. The next prime is 13033313243. The reversal of 13033313221 is 12231333031.

It can be written as a sum of positive squares in only one way, i.e., 10673782596 + 2359530625 = 103314^2 + 48575^2 .

It is not a de Polignac number, because 13033313221 - 2¹ = 13033313219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13033313192 and 13033313201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13033313261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1447206 + ... + 1456183.

It is an arithmetic number, because the mean of its divisors is an integer number (2205124705).

Almost surely, 2^13033313221 is an apocalyptic number.

It is an amenable number.

13033313221 is a deficient number, since it is larger than the sum of its proper divisors (197435009).

13033313221 is an frugal number, since it uses more digits than its factorization.

13033313221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2903523 (or 2903456 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 13033313221 its reverse (12231333031), we get a palindrome (25264646252).

The spelling of 13033313221 in words is "thirteen billion, thirty-three million, three hundred thirteen thousand, two hundred twenty-one".