201233011321 has 4 divisors (see below), whose sum is σ = 201981089700. Its totient is φ = 200484932944.

The previous prime is 201233011277. The next prime is 201233011361. The reversal of 201233011321 is 123110332102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123110332102 = 2 ⋅61555166051.

It can be written as a sum of positive squares in 2 ways, for example, as 44000935696 + 157232075625 = 209764^2 + 396525^2 .

It is a cyclic number.

It is not a de Polignac number, because 201233011321 - 2²⁷ = 201098793593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201233011361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374038786 + ... + 374039323.

It is an arithmetic number, because the mean of its divisors is an integer number (50495272425).

Almost surely, 2^201233011321 is an apocalyptic number.

It is an amenable number.

201233011321 is a deficient number, since it is larger than the sum of its proper divisors (748078379).

201233011321 is an equidigital number, since it uses as much as digits as its factorization.

201233011321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748078378.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 201233011321 its reverse (123110332102), we get a palindrome (324343343423).

The spelling of 201233011321 in words is "two hundred one billion, two hundred thirty-three million, eleven thousand, three hundred twenty-one".