203120202113 has 4 divisors (see below), whose sum is σ = 203151205188. Its totient is φ = 203089199040.

The previous prime is 203120202097. The next prime is 203120202149. The reversal of 203120202113 is 311202021302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311202021302 = 2 ⋅155601010651.

It can be written as a sum of positive squares in 2 ways, for example, as 22110797809 + 181009404304 = 148697^2 + 425452^2 .

It is a cyclic number.

It is not a de Polignac number, because 203120202113 - 2⁴ = 203120202097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203120202091 and 203120202100.

It is not an unprimeable number, because it can be changed into a prime (203120202913) 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, 15491708 + ... + 15504813.

It is an arithmetic number, because the mean of its divisors is an integer number (50787801297).

Almost surely, 2^203120202113 is an apocalyptic number.

It is an amenable number.

203120202113 is a deficient number, since it is larger than the sum of its proper divisors (31003075).

203120202113 is an equidigital number, since it uses as much as digits as its factorization.

203120202113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31003074.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 203120202113 its reverse (311202021302), we get a palindrome (514322223415).

The spelling of 203120202113 in words is "two hundred three billion, one hundred twenty million, two hundred two thousand, one hundred thirteen".