203112011321 has 16 divisors (see below), whose sum is σ = 219128236800. Its totient is φ = 187642880208.

The previous prime is 203112011293. The next prime is 203112011351. The reversal of 203112011321 is 123110211302.

It is a cyclic number.

It is not a de Polignac number, because 203112011321 - 2⁶ = 203112011257 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 203112011321.

It is not an unprimeable number, because it can be changed into a prime (203112011351) 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, 304910 + ... + 706536.

It is an arithmetic number, because the mean of its divisors is an integer number (13695514800).

Almost surely, 2^203112011321 is an apocalyptic number.

It is an amenable number.

203112011321 is a deficient number, since it is larger than the sum of its proper divisors (16016225479).

203112011321 is a wasteful number, since it uses less digits than its factorization.

203112011321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402308.

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

Adding to 203112011321 its reverse (123110211302), we get a palindrome (326222222623).

The spelling of 203112011321 in words is "two hundred three billion, one hundred twelve million, eleven thousand, three hundred twenty-one".