3012120221 has 16 divisors (see below), whose sum is σ = 3350896128. Its totient is φ = 2684260800.

The previous prime is 3012120193. The next prime is 3012120247. The reversal of 3012120221 is 1220212103.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3012120221 - 2⁶ = 3012120157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3012120196 and 3012120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3012120121) 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 15 ways as a sum of consecutive naturals, for example, 1285511 + ... + 1287851.

It is an arithmetic number, because the mean of its divisors is an integer number (209431008).

Almost surely, 2^3012120221 is an apocalyptic number.

It is an amenable number.

3012120221 is a deficient number, since it is larger than the sum of its proper divisors (338775907).

3012120221 is a wasteful number, since it uses less digits than its factorization.

3012120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4612.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 3012120221 is about 54882.7861993175. The cubic root of 3012120221 is about 1444.1892253680.

Adding to 3012120221 its reverse (1220212103), we get a palindrome (4232332324).

The spelling of 3012120221 in words is "three billion, twelve million, one hundred twenty thousand, two hundred twenty-one".