203013031321 has 4 divisors (see below), whose sum is σ = 203018490112. Its totient is φ = 203007572532.

The previous prime is 203013031303. The next prime is 203013031337. The reversal of 203013031321 is 123130310302.

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 203013031321 - 2⁹ = 203013030809 is a prime.

It is a super-2 number, since 2×203013031321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203013031301) 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, 2673225 + ... + 2748118.

It is an arithmetic number, because the mean of its divisors is an integer number (50754622528).

Almost surely, 2^203013031321 is an apocalyptic number.

It is an amenable number.

203013031321 is a deficient number, since it is larger than the sum of its proper divisors (5458791).

203013031321 is an equidigital number, since it uses as much as digits as its factorization.

203013031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5458790.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 203013031321 its reverse (123130310302), we get a palindrome (326143341623).

The spelling of 203013031321 in words is "two hundred three billion, thirteen million, thirty-one thousand, three hundred twenty-one".