201121300321 has 4 divisors (see below), whose sum is σ = 201903873732. Its totient is φ = 200338726912.

The previous prime is 201121300307. The next prime is 201121300361. The reversal of 201121300321 is 123003121102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96698609296 + 104422691025 = 310964^2 + 323145^2 .

It is a cyclic number.

It is not a de Polignac number, because 201121300321 - 2¹⁵ = 201121267553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201121300295 and 201121300304.

It is not an unprimeable number, because it can be changed into a prime (201121300361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391286320 + ... + 391286833.

It is an arithmetic number, because the mean of its divisors is an integer number (50475968433).

Almost surely, 2^201121300321 is an apocalyptic number.

It is an amenable number.

201121300321 is a deficient number, since it is larger than the sum of its proper divisors (782573411).

201121300321 is an equidigital number, since it uses as much as digits as its factorization.

201121300321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782573410.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 201121300321 its reverse (123003121102), we get a palindrome (324124421423).

The spelling of 201121300321 in words is "two hundred one billion, one hundred twenty-one million, three hundred thousand, three hundred twenty-one".