30221020330181 has 2 divisors, whose sum is σ = 30221020330182. Its totient is φ = 30221020330180.

The previous prime is 30221020330103. The next prime is 30221020330229. The reversal of 30221020330181 is 18103302012203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22625567009956 + 7595453320225 = 4756634^2 + 2755985^2 .

It is a cyclic number.

It is not a de Polignac number, because 30221020330181 - 2¹⁸ = 30221020068037 is a prime.

It is a super-2 number, since 2×30221020330181² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30221020330181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30221040330181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15110510165090 + 15110510165091.

It is an arithmetic number, because the mean of its divisors is an integer number (15110510165091).

Almost surely, 2^{30221020330181} is an apocalyptic number.

It is an amenable number.

30221020330181 is a deficient number, since it is larger than the sum of its proper divisors (1).

30221020330181 is an equidigital number, since it uses as much as digits as its factorization.

30221020330181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 30221020330181 its reverse (18103302012203), we get a palindrome (48324322342384).

The spelling of 30221020330181 in words is "thirty trillion, two hundred twenty-one billion, twenty million, three hundred thirty thousand, one hundred eighty-one".