202120102313 has 4 divisors (see below), whose sum is σ = 207049860948. Its totient is φ = 197190343680.

The previous prime is 202120102309. The next prime is 202120102339. The reversal of 202120102313 is 313201021202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313201021202 = 2 ⋅156600510601.

It can be written as a sum of positive squares in 2 ways, for example, as 107264110144 + 94855992169 = 327512^2 + 307987^2 .

It is a cyclic number.

It is not a de Polignac number, because 202120102313 - 2² = 202120102309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202120102291 and 202120102300.

It is not an unprimeable number, because it can be changed into a prime (202120102813) 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, 2464879256 + ... + 2464879337.

It is an arithmetic number, because the mean of its divisors is an integer number (51762465237).

Almost surely, 2^202120102313 is an apocalyptic number.

It is an amenable number.

202120102313 is a deficient number, since it is larger than the sum of its proper divisors (4929758635).

202120102313 is an equidigital number, since it uses as much as digits as its factorization.

202120102313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4929758634.

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

Adding to 202120102313 its reverse (313201021202), we get a palindrome (515321123515).

The spelling of 202120102313 in words is "two hundred two billion, one hundred twenty million, one hundred two thousand, three hundred thirteen".