203020321111 has 4 divisors (see below), whose sum is σ = 203030441224. Its totient is φ = 203010201000.

The previous prime is 203020321087. The next prime is 203020321171. The reversal of 203020321111 is 111123020302.

203020321111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 203020321111 - 2⁷ = 203020320983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203020321171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5029905 + ... + 5070106.

It is an arithmetic number, because the mean of its divisors is an integer number (50757610306).

Almost surely, 2^203020321111 is an apocalyptic number.

203020321111 is a deficient number, since it is larger than the sum of its proper divisors (10120113).

203020321111 is a wasteful number, since it uses less digits than its factorization.

203020321111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10120112.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 203020321111 its reverse (111123020302), we get a palindrome (314143341413).

The spelling of 203020321111 in words is "two hundred three billion, twenty million, three hundred twenty-one thousand, one hundred eleven".