201121659 has 12 divisors (see below), whose sum is σ = 290728152. Its totient is φ = 133980000.

The previous prime is 201121651. The next prime is 201121673. The reversal of 201121659 is 956121102.

201121659 is a `hidden beast` number, since 2 + 0 + 1 + 1 + 2 + 1 + 659 = 666.

It is not a de Polignac number, because 201121659 - 2³ = 201121651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201121651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5359 + ... + 20759.

It is an arithmetic number, because the mean of its divisors is an integer number (24227346).

Almost surely, 2^201121659 is an apocalyptic number.

201121659 is a deficient number, since it is larger than the sum of its proper divisors (89606493).

201121659 is a wasteful number, since it uses less digits than its factorization.

201121659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16858 (or 16855 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 201121659 is about 14181.7368118295. The cubic root of 201121659 is about 585.8947605007.

The spelling of 201121659 in words is "two hundred one million, one hundred twenty-one thousand, six hundred fifty-nine".