201189121 has 4 divisors (see below), whose sum is σ = 229930432. Its totient is φ = 172447812.

The previous prime is 201189083. The next prime is 201189127. The reversal of 201189121 is 121981102.

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.

It is a cyclic number.

It is not a de Polignac number, because 201189121 - 2⁷ = 201188993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201189127) 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, 14370645 + ... + 14370658.

It is an arithmetic number, because the mean of its divisors is an integer number (57482608).

Almost surely, 2^201189121 is an apocalyptic number.

It is an amenable number.

201189121 is a deficient number, since it is larger than the sum of its proper divisors (28741311).

201189121 is an equidigital number, since it uses as much as digits as its factorization.

201189121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28741310.

The product of its (nonzero) digits is 288, while the sum is 25.

The square root of 201189121 is about 14184.1150940057. The cubic root of 201189121 is about 585.9602618396.

The spelling of 201189121 in words is "two hundred one million, one hundred eighty-nine thousand, one hundred twenty-one".