159622121 has 2 divisors, whose sum is σ = 159622122. Its totient is φ = 159622120.

The previous prime is 159622091. The next prime is 159622147. The reversal of 159622121 is 121226951.

159622121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124634896 + 34987225 = 11164^2 + 5915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159622121 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (159622171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79811060 + 79811061.

It is an arithmetic number, because the mean of its divisors is an integer number (79811061).

Almost surely, 2^159622121 is an apocalyptic number.

It is an amenable number.

159622121 is a deficient number, since it is larger than the sum of its proper divisors (1).

159622121 is an equidigital number, since it uses as much as digits as its factorization.

159622121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 29.

The square root of 159622121 is about 12634.1648319151. The cubic root of 159622121 is about 542.4558024970.

The spelling of 159622121 in words is "one hundred fifty-nine million, six hundred twenty-two thousand, one hundred twenty-one".