203122672217 has 4 divisors (see below), whose sum is σ = 205021015056. Its totient is φ = 201224329380.

The previous prime is 203122672111. The next prime is 203122672219. The reversal of 203122672217 is 712276221302.

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 not a de Polignac number, because 203122672217 - 2²⁰ = 203121623641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203122672219) 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, 949171259 + ... + 949171472.

It is an arithmetic number, because the mean of its divisors is an integer number (51255253764).

Almost surely, 2^203122672217 is an apocalyptic number.

It is an amenable number.

203122672217 is a deficient number, since it is larger than the sum of its proper divisors (1898342839).

203122672217 is a wasteful number, since it uses less digits than its factorization.

203122672217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898342838.

The product of its (nonzero) digits is 28224, while the sum is 35.

Adding to 203122672217 its reverse (712276221302), we get a palindrome (915398893519).

The spelling of 203122672217 in words is "two hundred three billion, one hundred twenty-two million, six hundred seventy-two thousand, two hundred seventeen".