12113012221 has 8 divisors (see below), whose sum is σ = 12758476320. Its totient is φ = 11468341872.

The previous prime is 12113012207. The next prime is 12113012239. The reversal of 12113012221 is 12221031121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12113012221 - 2¹⁵ = 12112979453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12113012195 and 12113012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12113012521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166975 + ... + 228268.

It is an arithmetic number, because the mean of its divisors is an integer number (1594809540).

Almost surely, 2^12113012221 is an apocalyptic number.

It is an amenable number.

12113012221 is a deficient number, since it is larger than the sum of its proper divisors (645464099).

12113012221 is a wasteful number, since it uses less digits than its factorization.

12113012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396875.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12113012221 its reverse (12221031121), we get a palindrome (24334043342).

The spelling of 12113012221 in words is "twelve billion, one hundred thirteen million, twelve thousand, two hundred twenty-one".