13231035221 has 2 divisors, whose sum is σ = 13231035222. Its totient is φ = 13231035220.

The previous prime is 13231035193. The next prime is 13231035227. The reversal of 13231035221 is 12253013231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13038214225 + 192820996 = 114185^2 + 13886^2 .

It is a cyclic number.

It is not a de Polignac number, because 13231035221 - 2¹⁰ = 13231034197 is a prime.

It is a super-4 number, since 4×13231035221⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13231035227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6615517610 + 6615517611.

It is an arithmetic number, because the mean of its divisors is an integer number (6615517611).

Almost surely, 2^13231035221 is an apocalyptic number.

It is an amenable number.

13231035221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13231035221 is an equidigital number, since it uses as much as digits as its factorization.

13231035221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 13231035221 its reverse (12253013231), we get a palindrome (25484048452).

The spelling of 13231035221 in words is "thirteen billion, two hundred thirty-one million, thirty-five thousand, two hundred twenty-one".