203323221021 has 8 divisors (see below), whose sum is σ = 285365924320. Its totient is φ = 128414665872.

The previous prime is 203323221001. The next prime is 203323221077. The reversal of 203323221021 is 120122323302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 203323221021 - 2¹⁵ = 203323188253 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 (203323221001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1783536970 + ... + 1783537083.

It is an arithmetic number, because the mean of its divisors is an integer number (35670740540).

Almost surely, 2^203323221021 is an apocalyptic number.

It is an amenable number.

203323221021 is a deficient number, since it is larger than the sum of its proper divisors (82042703299).

203323221021 is a wasteful number, since it uses less digits than its factorization.

203323221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567074075.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 203323221021 its reverse (120122323302), we get a palindrome (323445544323).

The spelling of 203323221021 in words is "two hundred three billion, three hundred twenty-three million, two hundred twenty-one thousand, twenty-one".