12123030221 has 16 divisors (see below), whose sum is σ = 12724131840. Its totient is φ = 11536611840.

The previous prime is 12123030203. The next prime is 12123030223. The reversal of 12123030221 is 12203032121.

12123030221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12123030221 - 2²⁶ = 12055921357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12123030221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123030223) 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, 459260 + ... + 484938.

It is an arithmetic number, because the mean of its divisors is an integer number (795258240).

Almost surely, 2^12123030221 is an apocalyptic number.

It is an amenable number.

12123030221 is a deficient number, since it is larger than the sum of its proper divisors (601101619).

12123030221 is a wasteful number, since it uses less digits than its factorization.

12123030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25964.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12123030221 its reverse (12203032121), we get a palindrome (24326062342).

The spelling of 12123030221 in words is "twelve billion, one hundred twenty-three million, thirty thousand, two hundred twenty-one".