30122221 has 2 divisors, whose sum is σ = 30122222. Its totient is φ = 30122220.

The previous prime is 30122161. The next prime is 30122243. The reversal of 30122221 is 12222103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21206025 + 8916196 = 4605^2 + 2986^2 .

It is a cyclic number.

It is not a de Polignac number, because 30122221 - 2⁷ = 30122093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30122021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15061110 + 15061111.

It is an arithmetic number, because the mean of its divisors is an integer number (15061111).

Almost surely, 2^30122221 is an apocalyptic number.

It is an amenable number.

30122221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30122221 is an equidigital number, since it uses as much as digits as its factorization.

30122221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 30122221 is about 5488.3714342235. The cubic root of 30122221 is about 311.1446444816.

Adding to 30122221 its reverse (12222103), we get a palindrome (42344324).

It can be divided in two parts, 301 and 22221, that added together give a palindrome (22522).

The spelling of 30122221 in words is "thirty million, one hundred twenty-two thousand, two hundred twenty-one".