3012030221 has 4 divisors (see below), whose sum is σ = 3013704444. Its totient is φ = 3010356000.

The previous prime is 3012030211. The next prime is 3012030239. The reversal of 3012030221 is 1220302103.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1220302103 = 149 ⋅8189947.

It can be written as a sum of positive squares in 2 ways, for example, as 319873225 + 2692156996 = 17885^2 + 51886^2 .

It is a cyclic number.

It is not a de Polignac number, because 3012030221 - 2¹⁸ = 3011768077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3012030196 and 3012030205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3012030211) 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, 834410 + ... + 838011.

It is an arithmetic number, because the mean of its divisors is an integer number (753426111).

Almost surely, 2^3012030221 is an apocalyptic number.

It is an amenable number.

3012030221 is a deficient number, since it is larger than the sum of its proper divisors (1674223).

3012030221 is a wasteful number, since it uses less digits than its factorization.

3012030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674222.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 3012030221 is about 54881.9662639742. The cubic root of 3012030221 is about 1444.1748414440.

Adding to 3012030221 its reverse (1220302103), we get a palindrome (4232332324).

The spelling of 3012030221 in words is "three billion, twelve million, thirty thousand, two hundred twenty-one".