30313126021 has 2 divisors, whose sum is σ = 30313126022. Its totient is φ = 30313126020.

The previous prime is 30313126013. The next prime is 30313126093. The reversal of 30313126021 is 12062131303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25293403521 + 5019722500 = 159039^2 + 70850^2 .

It is an emirp because it is prime and its reverse (12062131303) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30313126021 - 2³ = 30313126013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30313125983 and 30313126001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30313126321) 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 as a sum of consecutive naturals, namely, 15156563010 + 15156563011.

It is an arithmetic number, because the mean of its divisors is an integer number (15156563011).

Almost surely, 2^30313126021 is an apocalyptic number.

It is an amenable number.

30313126021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30313126021 is an equidigital number, since it uses as much as digits as its factorization.

30313126021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 30313126021 its reverse (12062131303), we get a palindrome (42375257324).

The spelling of 30313126021 in words is "thirty billion, three hundred thirteen million, one hundred twenty-six thousand, twenty-one".