30310121213221 has 2 divisors, whose sum is σ = 30310121213222. Its totient is φ = 30310121213220.

The previous prime is 30310121213201. The next prime is 30310121213263. The reversal of 30310121213221 is 12231212101303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18364318900321 + 11945802312900 = 4285361^2 + 3456270^2 .

It is a cyclic number.

It is not a de Polignac number, because 30310121213221 - 2¹⁵ = 30310121180453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30310121213192 and 30310121213201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30310121213201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15155060606610 + 15155060606611.

It is an arithmetic number, because the mean of its divisors is an integer number (15155060606611).

Almost surely, 2^{30310121213221} is an apocalyptic number.

It is an amenable number.

30310121213221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30310121213221 is an equidigital number, since it uses as much as digits as its factorization.

30310121213221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 30310121213221 its reverse (12231212101303), we get a palindrome (42541333314524).

The spelling of 30310121213221 in words is "thirty trillion, three hundred ten billion, one hundred twenty-one million, two hundred thirteen thousand, two hundred twenty-one".