30312011321 has 2 divisors, whose sum is σ = 30312011322. Its totient is φ = 30312011320.

The previous prime is 30312011311. The next prime is 30312011329. The reversal of 30312011321 is 12311021303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20503089721 + 9808921600 = 143189^2 + 99040^2 .

It is a cyclic number.

It is not a de Polignac number, because 30312011321 - 2³⁰ = 29238269497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30312011321.

It is not a weakly prime, because it can be changed into another prime (30312011329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15156005660 + 15156005661.

It is an arithmetic number, because the mean of its divisors is an integer number (15156005661).

Almost surely, 2^30312011321 is an apocalyptic number.

It is an amenable number.

30312011321 is a deficient number, since it is larger than the sum of its proper divisors (1).

30312011321 is an equidigital number, since it uses as much as digits as its factorization.

30312011321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 30312011321 its reverse (12311021303), we get a palindrome (42623032624).

The spelling of 30312011321 in words is "thirty billion, three hundred twelve million, eleven thousand, three hundred twenty-one".