3121130030221 has 12 divisors (see below), whose sum is σ = 3632502445788. Its totient is φ = 2673927873792.

The previous prime is 3121130030219. The next prime is 3121130030269. The reversal of 3121130030221 is 1220300311213.

3121130030221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2303215993225 + 817914036996 = 1517635^2 + 904386^2 .

It is not a de Polignac number, because 3121130030221 - 2¹ = 3121130030219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121130039221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15691086 + ... + 15888751.

It is an arithmetic number, because the mean of its divisors is an integer number (302708537149).

Almost surely, 2^{3121130030221} is an apocalyptic number.

It is an amenable number.

3121130030221 is a deficient number, since it is larger than the sum of its proper divisors (511372415567).

3121130030221 is a wasteful number, since it uses less digits than its factorization.

3121130030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31581868 (or 31581861 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 3121130030221 its reverse (1220300311213), we get a palindrome (4341430341434).

The spelling of 3121130030221 in words is "three trillion, one hundred twenty-one billion, one hundred thirty million, thirty thousand, two hundred twenty-one".