30220001221 has 2 divisors, whose sum is σ = 30220001222. Its totient is φ = 30220001220.

The previous prime is 30220001213. The next prime is 30220001237. The reversal of 30220001221 is 12210002203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29854656225 + 365344996 = 172785^2 + 19114^2 .

It is a cyclic number.

It is not a de Polignac number, because 30220001221 - 2³ = 30220001213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30220001321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15110000610 + 15110000611.

It is an arithmetic number, because the mean of its divisors is an integer number (15110000611).

Almost surely, 2^30220001221 is an apocalyptic number.

It is an amenable number.

30220001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30220001221 is an equidigital number, since it uses as much as digits as its factorization.

30220001221 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.

Adding to 30220001221 its reverse (12210002203), we get a palindrome (42430003424).

The spelling of 30220001221 in words is "thirty billion, two hundred twenty million, one thousand, two hundred twenty-one".