203321331011 has 4 divisors (see below), whose sum is σ = 203323201152. Its totient is φ = 203319460872.

The previous prime is 203321331001. The next prime is 203321331019. The reversal of 203321331011 is 110133123302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 203321331011 - 2¹⁰ = 203321329987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203321331019) 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, 761216 + ... + 993021.

It is an arithmetic number, because the mean of its divisors is an integer number (50830800288).

Almost surely, 2^203321331011 is an apocalyptic number.

203321331011 is a deficient number, since it is larger than the sum of its proper divisors (1870141).

203321331011 is a wasteful number, since it uses less digits than its factorization.

203321331011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870140.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 203321331011 its reverse (110133123302), we get a palindrome (313454454313).

The spelling of 203321331011 in words is "two hundred three billion, three hundred twenty-one million, three hundred thirty-one thousand, eleven".