13033133221 has 2 divisors, whose sum is σ = 13033133222. Its totient is φ = 13033133220.

The previous prime is 13033133219. The next prime is 13033133227. The reversal of 13033133221 is 12233133031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9261945121 + 3771188100 = 96239^2 + 61410^2 .

It is a cyclic number.

It is not a de Polignac number, because 13033133221 - 2¹ = 13033133219 is a prime.

Together with 13033133219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 13033133192 and 13033133201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13033133227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6516566610 + 6516566611.

It is an arithmetic number, because the mean of its divisors is an integer number (6516566611).

Almost surely, 2^13033133221 is an apocalyptic number.

It is an amenable number.

13033133221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13033133221 is an equidigital number, since it uses as much as digits as its factorization.

13033133221 is an evil number, because the sum of its binary digits is even.

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

Adding to 13033133221 its reverse (12233133031), we get a palindrome (25266266252).

The spelling of 13033133221 in words is "thirteen billion, thirty-three million, one hundred thirty-three thousand, two hundred twenty-one".