203321321011 has 4 divisors (see below), whose sum is σ = 203322651952. Its totient is φ = 203319990072.

The previous prime is 203321321009. The next prime is 203321321017. The reversal of 203321321011 is 110123123302.

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 203321321011 - 2¹ = 203321321009 is a prime.

It is a super-2 number, since 2×203321321011² (a number of 23 digits) contains 22 as substring.

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 203321321011.

It is not an unprimeable number, because it can be changed into a prime (203321321017) 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, 401391 + ... + 753496.

It is an arithmetic number, because the mean of its divisors is an integer number (50830662988).

Almost surely, 2^203321321011 is an apocalyptic number.

203321321011 is a deficient number, since it is larger than the sum of its proper divisors (1330941).

203321321011 is a wasteful number, since it uses less digits than its factorization.

203321321011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330940.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 203321321011 its reverse (110123123302), we get a palindrome (313444444313).

The spelling of 203321321011 in words is "two hundred three billion, three hundred twenty-one million, three hundred twenty-one thousand, eleven".