203020112321 has 8 divisors (see below), whose sum is σ = 222762272040. Its totient is φ = 183867270912.

The previous prime is 203020112303. The next prime is 203020112371. The reversal of 203020112321 is 123211020302.

It can be written as a sum of positive squares in 4 ways, for example, as 41605800625 + 161414311696 = 203975^2 + 401764^2 .

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

It is not a de Polignac number, because 203020112321 - 2³⁰ = 201946370497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 203020112321.

It is not an unprimeable number, because it can be changed into a prime (203020112371) 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, 147328856 + ... + 147330233.

It is an arithmetic number, because the mean of its divisors is an integer number (27845284005).

Almost surely, 2^203020112321 is an apocalyptic number.

It is an amenable number.

203020112321 is a deficient number, since it is larger than the sum of its proper divisors (19742159719).

203020112321 is a wasteful number, since it uses less digits than its factorization.

203020112321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294659155.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 203020112321 its reverse (123211020302), we get a palindrome (326231132623).

The spelling of 203020112321 in words is "two hundred three billion, twenty million, one hundred twelve thousand, three hundred twenty-one".