12113030221 has 4 divisors (see below), whose sum is σ = 12113533600. Its totient is φ = 12112526844.

The previous prime is 12113030177. The next prime is 12113030231. The reversal of 12113030221 is 12203031121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12203031121 = 7433 ⋅1641737.

It is a cyclic number.

It is not a de Polignac number, because 12113030221 - 2²⁵ = 12079475789 is a prime.

It is a super-2 number, since 2×12113030221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12113030195 and 12113030204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12113030231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213681 + ... + 264358.

It is an arithmetic number, because the mean of its divisors is an integer number (3028383400).

Almost surely, 2^12113030221 is an apocalyptic number.

It is an amenable number.

12113030221 is a deficient number, since it is larger than the sum of its proper divisors (503379).

12113030221 is an equidigital number, since it uses as much as digits as its factorization.

12113030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503378.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12113030221 its reverse (12203031121), we get a palindrome (24316061342).

The spelling of 12113030221 in words is "twelve billion, one hundred thirteen million, thirty thousand, two hundred twenty-one".