203404013111 has 4 divisors (see below), whose sum is σ = 219050475672. Its totient is φ = 187757550552.

The previous prime is 203404013047. The next prime is 203404013161. The reversal of 203404013111 is 111310404302.

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

It is not a de Polignac number, because 203404013111 - 2⁶ = 203404013047 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 (203404013161) 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, 7823231261 + ... + 7823231286.

It is an arithmetic number, because the mean of its divisors is an integer number (54762618918).

Almost surely, 2^203404013111 is an apocalyptic number.

203404013111 is a deficient number, since it is larger than the sum of its proper divisors (15646462561).

203404013111 is a wasteful number, since it uses less digits than its factorization.

203404013111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15646462560.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 203404013111 its reverse (111310404302), we get a palindrome (314714417413).

The spelling of 203404013111 in words is "two hundred three billion, four hundred four million, thirteen thousand, one hundred eleven".