30302312221 has 4 divisors (see below), whose sum is σ = 30308550844. Its totient is φ = 30296073600.

The previous prime is 30302312143. The next prime is 30302312263. The reversal of 30302312221 is 12221320303.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28354855321 + 1947456900 = 168389^2 + 44130^2 .

It is a cyclic number.

It is not a de Polignac number, because 30302312221 - 2¹³ = 30302304029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30302352221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3112020 + ... + 3121741.

It is an arithmetic number, because the mean of its divisors is an integer number (7577137711).

Almost surely, 2^30302312221 is an apocalyptic number.

It is an amenable number.

30302312221 is a deficient number, since it is larger than the sum of its proper divisors (6238623).

30302312221 is an equidigital number, since it uses as much as digits as its factorization.

30302312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6238622.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 30302312221 its reverse (12221320303), we get a palindrome (42523632524).

The spelling of 30302312221 in words is "thirty billion, three hundred two million, three hundred twelve thousand, two hundred twenty-one".