30101221 has 2 divisors, whose sum is σ = 30101222. Its totient is φ = 30101220.

The previous prime is 30101189. The next prime is 30101251. The reversal of 30101221 is 12210103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15124321 + 14976900 = 3889^2 + 3870^2 .

It is a cyclic number.

It is not a de Polignac number, because 30101221 - 2⁵ = 30101189 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30101198 and 30101207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30101251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15050610 + 15050611.

It is an arithmetic number, because the mean of its divisors is an integer number (15050611).

Almost surely, 2^30101221 is an apocalyptic number.

It is an amenable number.

30101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30101221 is an equidigital number, since it uses as much as digits as its factorization.

30101221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 30101221 is about 5486.4579648440. The cubic root of 30101221 is about 311.0723218316.

Adding to 30101221 its reverse (12210103), we get a palindrome (42311324).

The spelling of 30101221 in words is "thirty million, one hundred one thousand, two hundred twenty-one".