203231023021 has 16 divisors (see below), whose sum is σ = 219927799168. Its totient is φ = 186688152000.

The previous prime is 203231023007. The next prime is 203231023111. The reversal of 203231023021 is 120320132302.

It is a cyclic number.

It is not a de Polignac number, because 203231023021 - 2¹¹ = 203231020973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 203231023021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203231023001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2477971 + ... + 2558671.

It is an arithmetic number, because the mean of its divisors is an integer number (13745487448).

Almost surely, 2^203231023021 is an apocalyptic number.

It is an amenable number.

203231023021 is a deficient number, since it is larger than the sum of its proper divisors (16696776147).

203231023021 is a wasteful number, since it uses less digits than its factorization.

203231023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81652.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 203231023021 its reverse (120320132302), we get a palindrome (323551155323).

The spelling of 203231023021 in words is "two hundred three billion, two hundred thirty-one million, twenty-three thousand, twenty-one".