30212411221 has 2 divisors, whose sum is σ = 30212411222. Its totient is φ = 30212411220.

The previous prime is 30212411191. The next prime is 30212411227. The reversal of 30212411221 is 12211421203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21575496996 + 8636914225 = 146886^2 + 92935^2 .

It is a cyclic number.

It is not a de Polignac number, because 30212411221 - 2¹¹ = 30212409173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30212411227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15106205610 + 15106205611.

It is an arithmetic number, because the mean of its divisors is an integer number (15106205611).

Almost surely, 2^30212411221 is an apocalyptic number.

It is an amenable number.

30212411221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30212411221 is an equidigital number, since it uses as much as digits as its factorization.

30212411221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 30212411221 its reverse (12211421203), we get a palindrome (42423832424).

The spelling of 30212411221 in words is "thirty billion, two hundred twelve million, four hundred eleven thousand, two hundred twenty-one".