13211033221 has 2 divisors, whose sum is σ = 13211033222. Its totient is φ = 13211033220.

The previous prime is 13211033219. The next prime is 13211033249. The reversal of 13211033221 is 12233011231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11489696100 + 1721337121 = 107190^2 + 41489^2 .

It is a cyclic number.

It is not a de Polignac number, because 13211033221 - 2¹ = 13211033219 is a prime.

Together with 13211033219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13211033281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6605516610 + 6605516611.

It is an arithmetic number, because the mean of its divisors is an integer number (6605516611).

Almost surely, 2^13211033221 is an apocalyptic number.

It is an amenable number.

13211033221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13211033221 is an equidigital number, since it uses as much as digits as its factorization.

13211033221 is an evil number, because the sum of its binary digits is even.

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

Adding to 13211033221 its reverse (12233011231), we get a palindrome (25444044452).

The spelling of 13211033221 in words is "thirteen billion, two hundred eleven million, thirty-three thousand, two hundred twenty-one".