203023201109 has 4 divisors (see below), whose sum is σ = 204043418400. Its totient is φ = 202002983820.

The previous prime is 203023201081. The next prime is 203023201133. The reversal of 203023201109 is 901102320302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203023201109 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 (203023203109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510108347 + ... + 510108744.

It is an arithmetic number, because the mean of its divisors is an integer number (51010854600).

Almost surely, 2^203023201109 is an apocalyptic number.

It is an amenable number.

203023201109 is a deficient number, since it is larger than the sum of its proper divisors (1020217291).

203023201109 is a wasteful number, since it uses less digits than its factorization.

203023201109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020217290.

The product of its (nonzero) digits is 648, while the sum is 23.

The spelling of 203023201109 in words is "two hundred three billion, twenty-three million, two hundred one thousand, one hundred nine".