201233221121 has 4 divisors (see below), whose sum is σ = 201236742144. Its totient is φ = 201229700100.

The previous prime is 201233221103. The next prime is 201233221177. The reversal of 201233221121 is 121122332102.

201233221121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-201233221121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201233221093 and 201233221102.

It is not an unprimeable number, because it can be changed into a prime (201233224121) 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, 1673345 + ... + 1789566.

It is an arithmetic number, because the mean of its divisors is an integer number (50309185536).

Almost surely, 2^201233221121 is an apocalyptic number.

It is an amenable number.

201233221121 is a deficient number, since it is larger than the sum of its proper divisors (3521023).

201233221121 is an equidigital number, since it uses as much as digits as its factorization.

201233221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521022.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 201233221121 its reverse (121122332102), we get a palindrome (322355553223).

The spelling of 201233221121 in words is "two hundred one billion, two hundred thirty-three million, two hundred twenty-one thousand, one hundred twenty-one".