203031311344321 has 4 divisors (see below), whose sum is σ = 203067188945200. Its totient is φ = 202995433743444.

The previous prime is 203031311344297. The next prime is 203031311344387. The reversal of 203031311344321 is 123443113130302.

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 203031311344321 - 2⁷ = 203031311344193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203031311344391) 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 3 ways as a sum of consecutive naturals, for example, 17938791951 + ... + 17938803268.

It is an arithmetic number, because the mean of its divisors is an integer number (50766797236300).

Almost surely, 2^{203031311344321} is an apocalyptic number.

It is an amenable number.

203031311344321 is a deficient number, since it is larger than the sum of its proper divisors (35877600879).

203031311344321 is an equidigital number, since it uses as much as digits as its factorization.

203031311344321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35877600878.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 203031311344321 its reverse (123443113130302), we get a palindrome (326474424474623).

The spelling of 203031311344321 in words is "two hundred three trillion, thirty-one billion, three hundred eleven million, three hundred forty-four thousand, three hundred twenty-one".