30122321 has 2 divisors, whose sum is σ = 30122322. Its totient is φ = 30122320.

The previous prime is 30122311. The next prime is 30122333. The reversal of 30122321 is 12322103.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26122321 + 4000000 = 5111^2 + 2000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30122321 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30122296 and 30122305.

It is not a weakly prime, because it can be changed into another prime (30122311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15061160 + 15061161.

It is an arithmetic number, because the mean of its divisors is an integer number (15061161).

Almost surely, 2^30122321 is an apocalyptic number.

It is an amenable number.

30122321 is a deficient number, since it is larger than the sum of its proper divisors (1).

30122321 is an equidigital number, since it uses as much as digits as its factorization.

30122321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 30122321 is about 5488.3805443865. The cubic root of 30122321 is about 311.1449887948.

Adding to 30122321 its reverse (12322103), we get a palindrome (42444424).

It can be divided in two parts, 301 and 22321, that added together give a palindrome (22622).

The spelling of 30122321 in words is "thirty million, one hundred twenty-two thousand, three hundred twenty-one".