11310310021 has 2 divisors, whose sum is σ = 11310310022. Its totient is φ = 11310310020.

The previous prime is 11310310019. The next prime is 11310310057. The reversal of 11310310021 is 12001301311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9557213121 + 1753096900 = 97761^2 + 41870^2 .

It is a cyclic number.

It is not a de Polignac number, because 11310310021 - 2¹ = 11310310019 is a prime.

It is a super-2 number, since 2×11310310021² (a number of 21 digits) contains 22 as substring.

Together with 11310310019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 11310309983 and 11310310010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11310310091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5655155010 + 5655155011.

It is an arithmetic number, because the mean of its divisors is an integer number (5655155011).

Almost surely, 2^11310310021 is an apocalyptic number.

It is an amenable number.

11310310021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11310310021 is an equidigital number, since it uses as much as digits as its factorization.

11310310021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 11310310021 its reverse (12001301311), we get a palindrome (23311611332).

The spelling of 11310310021 in words is "eleven billion, three hundred ten million, three hundred ten thousand, twenty-one".