203231233021 has 4 divisors (see below), whose sum is σ = 215186011452. Its totient is φ = 191276454592.

The previous prime is 203231233019. The next prime is 203231233033. The reversal of 203231233021 is 120332132302.

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 159671368921 + 43559864100 = 399589^2 + 208710^2 .

It is a cyclic number.

It is not a de Polignac number, because 203231233021 - 2¹ = 203231233019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203231232983 and 203231233001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203231233061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5977389190 + ... + 5977389223.

It is an arithmetic number, because the mean of its divisors is an integer number (53796502863).

Almost surely, 2^203231233021 is an apocalyptic number.

It is an amenable number.

203231233021 is a deficient number, since it is larger than the sum of its proper divisors (11954778431).

203231233021 is a wasteful number, since it uses less digits than its factorization.

203231233021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11954778430.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 203231233021 its reverse (120332132302), we get a palindrome (323563365323).

The spelling of 203231233021 in words is "two hundred three billion, two hundred thirty-one million, two hundred thirty-three thousand, twenty-one".