203321121101 has 16 divisors (see below), whose sum is σ = 237837060864. Its totient is φ = 170219055744.

The previous prime is 203321121077. The next prime is 203321121109. The reversal of 203321121101 is 101121123302.

It is a cyclic number.

It is not a de Polignac number, because 203321121101 - 2³⁰ = 202247379277 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 203321121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203321121109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1878866 + ... + 1984131.

It is an arithmetic number, because the mean of its divisors is an integer number (14864816304).

Almost surely, 2^203321121101 is an apocalyptic number.

It is an amenable number.

203321121101 is a deficient number, since it is larger than the sum of its proper divisors (34515939763).

203321121101 is a wasteful number, since it uses less digits than its factorization.

203321121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3863180.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 203321121101 its reverse (101121123302), we get a palindrome (304442244403).

The spelling of 203321121101 in words is "two hundred three billion, three hundred twenty-one million, one hundred twenty-one thousand, one hundred one".