203231032021 has 4 divisors (see below), whose sum is σ = 212067163872. Its totient is φ = 194394900172.

The previous prime is 203231032007. The next prime is 203231032031. The reversal of 203231032021 is 120230132302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 203231032021 - 2¹⁷ = 203230900949 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 203231032021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203231032031) 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, 4418065891 + ... + 4418065936.

It is an arithmetic number, because the mean of its divisors is an integer number (53016790968).

Almost surely, 2^203231032021 is an apocalyptic number.

It is an amenable number.

203231032021 is a deficient number, since it is larger than the sum of its proper divisors (8836131851).

203231032021 is an equidigital number, since it uses as much as digits as its factorization.

203231032021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8836131850.

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

Adding to 203231032021 its reverse (120230132302), we get a palindrome (323461164323).

The spelling of 203231032021 in words is "two hundred three billion, two hundred thirty-one million, thirty-two thousand, twenty-one".