203203042021 has 16 divisors (see below), whose sum is σ = 240894743040. Its totient is φ = 167709749760.

The previous prime is 203203042001. The next prime is 203203042039. The reversal of 203203042021 is 120240302302.

It is not a de Polignac number, because 203203042021 - 2⁷ = 203203041893 is a prime.

It is a super-4 number, since 4×203203042021⁴ (a number of 46 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 203203042021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203203042001) 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 15 ways as a sum of consecutive naturals, for example, 1289260 + ... + 1438261.

It is an arithmetic number, because the mean of its divisors is an integer number (15055921440).

Almost surely, 2^203203042021 is an apocalyptic number.

It is an amenable number.

203203042021 is a deficient number, since it is larger than the sum of its proper divisors (37691701019).

203203042021 is a wasteful number, since it uses less digits than its factorization.

203203042021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2727924.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 203203042021 its reverse (120240302302), we get a palindrome (323443344323).

The spelling of 203203042021 in words is "two hundred three billion, two hundred three million, forty-two thousand, twenty-one".