221432145326191 has 2 divisors, whose sum is σ = 221432145326192. Its totient is φ = 221432145326190.

The previous prime is 221432145326129. The next prime is 221432145326261. The reversal of 221432145326191 is 191623541234122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221432145326191 - 2¹⁵ = 221432145293423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221432145626191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110716072663095 + 110716072663096.

It is an arithmetic number, because the mean of its divisors is an integer number (110716072663096).

Almost surely, 2^{221432145326191} is an apocalyptic number.

221432145326191 is a deficient number, since it is larger than the sum of its proper divisors (1).

221432145326191 is an equidigital number, since it uses as much as digits as its factorization.

221432145326191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 46.

The spelling of 221432145326191 in words is "two hundred twenty-one trillion, four hundred thirty-two billion, one hundred forty-five million, three hundred twenty-six thousand, one hundred ninety-one".