203313400200221 has 4 divisors (see below), whose sum is σ = 203645069695452. Its totient is φ = 202981730704992.

The previous prime is 203313400200203. The next prime is 203313400200269. The reversal of 203313400200221 is 122002004313302.

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 92429572840900 + 110883827359321 = 9614030^2 + 10530139^2 .

It is a cyclic number.

It is not a de Polignac number, because 203313400200221 - 2¹⁴ = 203313400183837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203313400200271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165834746696 + ... + 165834747921.

It is an arithmetic number, because the mean of its divisors is an integer number (50911267423863).

Almost surely, 2^{203313400200221} is an apocalyptic number.

It is an amenable number.

203313400200221 is a deficient number, since it is larger than the sum of its proper divisors (331669495231).

203313400200221 is an equidigital number, since it uses as much as digits as its factorization.

203313400200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331669495230.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 203313400200221 its reverse (122002004313302), we get a palindrome (325315404513523).

The spelling of 203313400200221 in words is "two hundred three trillion, three hundred thirteen billion, four hundred million, two hundred thousand, two hundred twenty-one".