203113223113321 has 4 divisors (see below), whose sum is σ = 203115692327044. Its totient is φ = 203110753899600.

The previous prime is 203113223113289. The next prime is 203113223113327. The reversal of 203113223113321 is 123311322311302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61666467840000 + 141446755273321 = 7852800^2 + 11893139^2 .

It is a cyclic number.

It is not a de Polignac number, because 203113223113321 - 2⁵ = 203113223113289 is a prime.

It is a super-2 number, since 2×203113223113321² (a number of 29 digits) contains 22 as substring.

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 203113223113321.

It is not an unprimeable number, because it can be changed into a prime (203113223113327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1234483470 + ... + 1234647991.

It is an arithmetic number, because the mean of its divisors is an integer number (50778923081761).

Almost surely, 2^{203113223113321} is an apocalyptic number.

It is an amenable number.

203113223113321 is a deficient number, since it is larger than the sum of its proper divisors (2469213723).

203113223113321 is an equidigital number, since it uses as much as digits as its factorization.

203113223113321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2469213722.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 203113223113321 its reverse (123311322311302), we get a palindrome (326424545424623).

The spelling of 203113223113321 in words is "two hundred three trillion, one hundred thirteen billion, two hundred twenty-three million, one hundred thirteen thousand, three hundred twenty-one".