43221120191 has 2 divisors, whose sum is σ = 43221120192. Its totient is φ = 43221120190.

The previous prime is 43221120169. The next prime is 43221120199. The reversal of 43221120191 is 19102112234.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43221120191 - 2¹⁸ = 43220858047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43221120191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43221120199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21610560095 + 21610560096.

It is an arithmetic number, because the mean of its divisors is an integer number (21610560096).

Almost surely, 2^43221120191 is an apocalyptic number.

43221120191 is a deficient number, since it is larger than the sum of its proper divisors (1).

43221120191 is an equidigital number, since it uses as much as digits as its factorization.

43221120191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 43221120191 in words is "forty-three billion, two hundred twenty-one million, one hundred twenty thousand, one hundred ninety-one".