13221221327 has 2 divisors, whose sum is σ = 13221221328. Its totient is φ = 13221221326.

The previous prime is 13221221267. The next prime is 13221221329. The reversal of 13221221327 is 72312212231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13221221327 - 2⁶ = 13221221263 is a prime.

Together with 13221221329, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13221221296 and 13221221305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13221221329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610610663 + 6610610664.

It is an arithmetic number, because the mean of its divisors is an integer number (6610610664).

Almost surely, 2^13221221327 is an apocalyptic number.

13221221327 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221221327 is an equidigital number, since it uses as much as digits as its factorization.

13221221327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 26.

Adding to 13221221327 its reverse (72312212231), we get a palindrome (85533433558).

The spelling of 13221221327 in words is "thirteen billion, two hundred twenty-one million, two hundred twenty-one thousand, three hundred twenty-seven".