30220212221 has 2 divisors, whose sum is σ = 30220212222. Its totient is φ = 30220212220.

The previous prime is 30220212053. The next prime is 30220212223. The reversal of 30220212221 is 12221202203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29348486596 + 871725625 = 171314^2 + 29525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30220212221 is a prime.

It is a super-2 number, since 2×30220212221² (a number of 22 digits) contains 22 as substring.

Together with 30220212223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30220212221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30220212223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15110106110 + 15110106111.

It is an arithmetic number, because the mean of its divisors is an integer number (15110106111).

Almost surely, 2^30220212221 is an apocalyptic number.

It is an amenable number.

30220212221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30220212221 is an equidigital number, since it uses as much as digits as its factorization.

30220212221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 30220212221 its reverse (12221202203), we get a palindrome (42441414424).

The spelling of 30220212221 in words is "thirty billion, two hundred twenty million, two hundred twelve thousand, two hundred twenty-one".