30213231221 has 2 divisors, whose sum is σ = 30213231222. Its totient is φ = 30213231220.

The previous prime is 30213231199. The next prime is 30213231247. The reversal of 30213231221 is 12213231203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28971444100 + 1241787121 = 170210^2 + 35239^2 .

It is a cyclic number.

It is not a de Polignac number, because 30213231221 - 2¹⁰ = 30213230197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30213231193 and 30213231202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30213231271) 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, 15106615610 + 15106615611.

It is an arithmetic number, because the mean of its divisors is an integer number (15106615611).

Almost surely, 2^30213231221 is an apocalyptic number.

It is an amenable number.

30213231221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30213231221 is an equidigital number, since it uses as much as digits as its factorization.

30213231221 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 20.

Adding to 30213231221 its reverse (12213231203), we get a palindrome (42426462424).

The spelling of 30213231221 in words is "thirty billion, two hundred thirteen million, two hundred thirty-one thousand, two hundred twenty-one".