30131220441221 has 2 divisors, whose sum is σ = 30131220441222. Its totient is φ = 30131220441220.

The previous prime is 30131220441197. The next prime is 30131220441247. The reversal of 30131220441221 is 12214402213103.

It is a happy number.

It is an a-pointer prime, because the next prime (30131220441247) can be obtained adding 30131220441221 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21461075412100 + 8670145029121 = 4632610^2 + 2944511^2 .

It is a cyclic number.

It is not a de Polignac number, because 30131220441221 - 2¹⁰ = 30131220440197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30131220441521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15065610220610 + 15065610220611.

It is an arithmetic number, because the mean of its divisors is an integer number (15065610220611).

Almost surely, 2^{30131220441221} is an apocalyptic number.

It is an amenable number.

30131220441221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30131220441221 is an equidigital number, since it uses as much as digits as its factorization.

30131220441221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 30131220441221 its reverse (12214402213103), we get a palindrome (42345622654324).

The spelling of 30131220441221 in words is "thirty trillion, one hundred thirty-one billion, two hundred twenty million, four hundred forty-one thousand, two hundred twenty-one".