30320212121 has 4 divisors (see below), whose sum is σ = 30320563200. Its totient is φ = 30319861044.

The previous prime is 30320212081. The next prime is 30320212127. The reversal of 30320212121 is 12121202303.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12121202303 = 7 ⋅1731600329.

It is a cyclic number.

It is not a de Polignac number, because 30320212121 - 2⁶ = 30320212057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30320212121.

It is not an unprimeable number, because it can be changed into a prime (30320212127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54440 + ... + 252198.

It is an arithmetic number, because the mean of its divisors is an integer number (7580140800).

Almost surely, 2^30320212121 is an apocalyptic number.

It is an amenable number.

30320212121 is a deficient number, since it is larger than the sum of its proper divisors (351079).

30320212121 is a wasteful number, since it uses less digits than its factorization.

30320212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351078.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 30320212121 its reverse (12121202303), we get a palindrome (42441414424).

The spelling of 30320212121 in words is "thirty billion, three hundred twenty million, two hundred twelve thousand, one hundred twenty-one".