13221023011891 has 2 divisors, whose sum is σ = 13221023011892. Its totient is φ = 13221023011890.

The previous prime is 13221023011841. The next prime is 13221023012089. The reversal of 13221023011891 is 19811032012231.

It is a weak prime.

It is an emirp because it is prime and its reverse (19811032012231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13221023011891 - 2⁹ = 13221023011379 is a prime.

It is not a weakly prime, because it can be changed into another prime (13221023011841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610511505945 + 6610511505946.

It is an arithmetic number, because the mean of its divisors is an integer number (6610511505946).

Almost surely, 2^{13221023011891} is an apocalyptic number.

13221023011891 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221023011891 is an equidigital number, since it uses as much as digits as its factorization.

13221023011891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 13221023011891 in words is "thirteen trillion, two hundred twenty-one billion, twenty-three million, eleven thousand, eight hundred ninety-one".