30220121 has 2 divisors, whose sum is σ = 30220122. Its totient is φ = 30220120.

The previous prime is 30220111. The next prime is 30220139. The reversal of 30220121 is 12102203.

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., 26666896 + 3553225 = 5164^2 + 1885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30220121 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30220111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15110060 + 15110061.

It is an arithmetic number, because the mean of its divisors is an integer number (15110061).

Almost surely, 2^30220121 is an apocalyptic number.

It is an amenable number.

30220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

30220121 is an equidigital number, since it uses as much as digits as its factorization.

30220121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 30220121 is about 5497.2830562015. The cubic root of 30220121 is about 311.4813628988.

Adding to 30220121 its reverse (12102203), we get a palindrome (42322324).

The spelling of 30220121 in words is "thirty million, two hundred twenty thousand, one hundred twenty-one".