201121201 has 4 divisors (see below), whose sum is σ = 203544432. Its totient is φ = 198697972.

The previous prime is 201121183. The next prime is 201121229. The reversal of 201121201 is 102121102.

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: 102121102 = 2 ⋅51060551.

It is a cyclic number.

It is not a de Polignac number, because 201121201 - 2⁷ = 201121073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201121001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1211491 + ... + 1211656.

It is an arithmetic number, because the mean of its divisors is an integer number (50886108).

Almost surely, 2^201121201 is an apocalyptic number.

It is an amenable number.

201121201 is a deficient number, since it is larger than the sum of its proper divisors (2423231).

201121201 is an equidigital number, since it uses as much as digits as its factorization.

201121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2423230.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 201121201 is about 14181.7206642918. The cubic root of 201121201 is about 585.8943157616.

Adding to 201121201 its reverse (102121102), we get a palindrome (303242303).

Subtracting from 201121201 its reverse (102121102), we obtain a palindrome (99000099).

The spelling of 201121201 in words is "two hundred one million, one hundred twenty-one thousand, two hundred one".