3020331221 has 4 divisors (see below), whose sum is σ = 3021038412. Its totient is φ = 3019624032.

The previous prime is 3020331203. The next prime is 3020331233. The reversal of 3020331221 is 1221330203.

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 692268721 + 2328062500 = 26311^2 + 48250^2 .

It is a cyclic number.

It is not a de Polignac number, because 3020331221 - 2¹⁰ = 3020330197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3020331221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3020331421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347150 + ... + 355743.

It is an arithmetic number, because the mean of its divisors is an integer number (755259603).

Almost surely, 2^3020331221 is an apocalyptic number.

It is an amenable number.

3020331221 is a deficient number, since it is larger than the sum of its proper divisors (707191).

3020331221 is an equidigital number, since it uses as much as digits as its factorization.

3020331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707190.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 3020331221 is about 54957.5401651129. The cubic root of 3020331221 is about 1445.5003150120.

Adding to 3020331221 its reverse (1221330203), we get a palindrome (4241661424).

The spelling of 3020331221 in words is "three billion, twenty million, three hundred thirty-one thousand, two hundred twenty-one".