13203311221 has 8 divisors (see below), whose sum is σ = 13710624984. Its totient is φ = 12704820480.

The previous prime is 13203311201. The next prime is 13203311243. The reversal of 13203311221 is 12211330231.

It can be written as a sum of positive squares in 4 ways, for example, as 181306225 + 13022004996 = 13465^2 + 114114^2 .

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 13203311221 - 2⁹ = 13203310709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13203311201) 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, 2202706 + ... + 2208691.

It is an arithmetic number, because the mean of its divisors is an integer number (1713828123).

Almost surely, 2^13203311221 is an apocalyptic number.

It is an amenable number.

13203311221 is a deficient number, since it is larger than the sum of its proper divisors (507313763).

13203311221 is an equidigital number, since it uses as much as digits as its factorization.

13203311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4411511.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 13203311221 its reverse (12211330231), we get a palindrome (25414641452).

The spelling of 13203311221 in words is "thirteen billion, two hundred three million, three hundred eleven thousand, two hundred twenty-one".