159221922081 has 4 divisors (see below), whose sum is σ = 212295896112. Its totient is φ = 106147948052.

The previous prime is 159221922073. The next prime is 159221922127. The reversal of 159221922081 is 180229122951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180229122951 = 3 ⋅60076374317.

It is a cyclic number.

It is not a de Polignac number, because 159221922081 - 2³ = 159221922073 is a prime.

It is a super-2 number, since 2×159221922081² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (159221922001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26536987011 + ... + 26536987016.

It is an arithmetic number, because the mean of its divisors is an integer number (53073974028).

Almost surely, 2^159221922081 is an apocalyptic number.

It is an amenable number.

159221922081 is a deficient number, since it is larger than the sum of its proper divisors (53073974031).

159221922081 is an equidigital number, since it uses as much as digits as its factorization.

159221922081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53073974030.

The product of its (nonzero) digits is 51840, while the sum is 42.

The spelling of 159221922081 in words is "one hundred fifty-nine billion, two hundred twenty-one million, nine hundred twenty-two thousand, eighty-one".