203121333103313 has 16 divisors (see below), whose sum is σ = 208966986378240. Its totient is φ = 197294676264000.

The previous prime is 203121333103301. The next prime is 203121333103357. The reversal of 203121333103313 is 313301333121302.

It is a cyclic number.

It is not a de Polignac number, because 203121333103313 - 2²⁰ = 203121332054737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203121333103373) 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, 53276288 + ... + 56961438.

It is an arithmetic number, because the mean of its divisors is an integer number (13060436648640).

Almost surely, 2^{203121333103313} is an apocalyptic number.

It is an amenable number.

203121333103313 is a deficient number, since it is larger than the sum of its proper divisors (5845653274927).

203121333103313 is a wasteful number, since it uses less digits than its factorization.

203121333103313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687728.

The product of its (nonzero) digits is 8748, while the sum is 29.

Adding to 203121333103313 its reverse (313301333121302), we get a palindrome (516422666224615).

The spelling of 203121333103313 in words is "two hundred three trillion, one hundred twenty-one billion, three hundred thirty-three million, one hundred three thousand, three hundred thirteen".