30030311221 has 4 divisors (see below), whose sum is σ = 30841941292. Its totient is φ = 29218681152.

The previous prime is 30030311209. The next prime is 30030311239. The reversal of 30030311221 is 12211303003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12211303003 = 22039 ⋅554077.

It can be written as a sum of positive squares in 2 ways, for example, as 17116488900 + 12913822321 = 130830^2 + 113639^2 .

It is a cyclic number.

It is not a de Polignac number, because 30030311221 - 2¹¹ = 30030309173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30030311195 and 30030311204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30030311251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405814980 + ... + 405815053.

It is an arithmetic number, because the mean of its divisors is an integer number (7710485323).

Almost surely, 2^30030311221 is an apocalyptic number.

It is an amenable number.

30030311221 is a deficient number, since it is larger than the sum of its proper divisors (811630071).

30030311221 is an equidigital number, since it uses as much as digits as its factorization.

30030311221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811630070.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 30030311221 its reverse (12211303003), we get a palindrome (42241614224).

The spelling of 30030311221 in words is "thirty billion, thirty million, three hundred eleven thousand, two hundred twenty-one".