30311221211 has 2 divisors, whose sum is σ = 30311221212. Its totient is φ = 30311221210.

The previous prime is 30311221181. The next prime is 30311221219. The reversal of 30311221211 is 11212211303.

It is a strong prime.

It is an emirp because it is prime and its reverse (11212211303) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30311221211 - 2¹⁸ = 30310959067 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30311221211.

It is not a weakly prime, because it can be changed into another prime (30311221219) 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, 15155610605 + 15155610606.

It is an arithmetic number, because the mean of its divisors is an integer number (15155610606).

Almost surely, 2^30311221211 is an apocalyptic number.

30311221211 is a deficient number, since it is larger than the sum of its proper divisors (1).

30311221211 is an equidigital number, since it uses as much as digits as its factorization.

30311221211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 30311221211 its reverse (11212211303), we get a palindrome (41523432514).

The spelling of 30311221211 in words is "thirty billion, three hundred eleven million, two hundred twenty-one thousand, two hundred eleven".