3020031221 has 4 divisors (see below), whose sum is σ = 3062566944. Its totient is φ = 2977495500.

The previous prime is 3020031211. The next prime is 3020031227. The reversal of 3020031221 is 1221300203.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 3020031221 - 2¹⁰ = 3020030197 is a prime.

It is a super-3 number, since 3×3020031221³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3020031196 and 3020031205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3020031227) 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, 21267755 + ... + 21267896.

It is an arithmetic number, because the mean of its divisors is an integer number (765641736).

Almost surely, 2^3020031221 is an apocalyptic number.

It is an amenable number.

3020031221 is a deficient number, since it is larger than the sum of its proper divisors (42535723).

3020031221 is an equidigital number, since it uses as much as digits as its factorization.

3020031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42535722.

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

The square root of 3020031221 is about 54954.8107175341. The cubic root of 3020031221 is about 1445.4524544275.

Adding to 3020031221 its reverse (1221300203), we get a palindrome (4241331424).

The spelling of 3020031221 in words is "three billion, twenty million, thirty-one thousand, two hundred twenty-one".