12223445567891 has 2 divisors, whose sum is σ = 12223445567892. Its totient is φ = 12223445567890.

The previous prime is 12223445567881. The next prime is 12223445567911. The reversal of 12223445567891 is 19876554432221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12223445567891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12223445567891.

It is not a weakly prime, because it can be changed into another prime (12223445567881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111722783945 + 6111722783946.

It is an arithmetic number, because the mean of its divisors is an integer number (6111722783946).

Almost surely, 2^{12223445567891} is an apocalyptic number.

12223445567891 is a deficient number, since it is larger than the sum of its proper divisors (1).

12223445567891 is an equidigital number, since it uses as much as digits as its factorization.

12223445567891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29030400, while the sum is 59.

The spelling of 12223445567891 in words is "twelve trillion, two hundred twenty-three billion, four hundred forty-five million, five hundred sixty-seven thousand, eight hundred ninety-one".