159721609111 has 2 divisors, whose sum is σ = 159721609112. Its totient is φ = 159721609110.

The previous prime is 159721609087. The next prime is 159721609129. The reversal of 159721609111 is 111906127951.

It is a strong prime.

It is an emirp because it is prime and its reverse (111906127951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 159721609111 - 2⁵ = 159721609079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159721609711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79860804555 + 79860804556.

It is an arithmetic number, because the mean of its divisors is an integer number (79860804556).

Almost surely, 2^159721609111 is an apocalyptic number.

159721609111 is a deficient number, since it is larger than the sum of its proper divisors (1).

159721609111 is an equidigital number, since it uses as much as digits as its factorization.

159721609111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 43.

The spelling of 159721609111 in words is "one hundred fifty-nine billion, seven hundred twenty-one million, six hundred nine thousand, one hundred eleven".