30302232221 has 2 divisors, whose sum is σ = 30302232222. Its totient is φ = 30302232220.

The previous prime is 30302232217. The next prime is 30302232239. The reversal of 30302232221 is 12223220303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29609805625 + 692426596 = 172075^2 + 26314^2 .

It is a cyclic number.

It is not a de Polignac number, because 30302232221 - 2² = 30302232217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30302232193 and 30302232202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30302232281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15151116110 + 15151116111.

It is an arithmetic number, because the mean of its divisors is an integer number (15151116111).

Almost surely, 2^30302232221 is an apocalyptic number.

It is an amenable number.

30302232221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30302232221 is an equidigital number, since it uses as much as digits as its factorization.

30302232221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 30302232221 its reverse (12223220303), we get a palindrome (42525452524).

The spelling of 30302232221 in words is "thirty billion, three hundred two million, two hundred thirty-two thousand, two hundred twenty-one".