3021220221 has 8 divisors (see below), whose sum is σ = 4065941664. Its totient is φ = 1995322800.

The previous prime is 3021220211. The next prime is 3021220249. The reversal of 3021220221 is 1220221203.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3021220221 - 2⁶ = 3021220157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3021220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3021220211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4705630 + ... + 4706271.

It is an arithmetic number, because the mean of its divisors is an integer number (508242708).

Almost surely, 2^3021220221 is an apocalyptic number.

It is an amenable number.

3021220221 is a deficient number, since it is larger than the sum of its proper divisors (1044721443).

3021220221 is a wasteful number, since it uses less digits than its factorization.

3021220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9412011.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 3021220221 is about 54965.6276321848. The cubic root of 3021220221 is about 1445.6421232693.

Adding to 3021220221 its reverse (1220221203), we get a palindrome (4241441424).

The spelling of 3021220221 in words is "three billion, twenty-one million, two hundred twenty thousand, two hundred twenty-one".