12130221221 has 8 divisors (see below), whose sum is σ = 12210004800. Its totient is φ = 12050571520.

The previous prime is 12130221199. The next prime is 12130221223. The reversal of 12130221221 is 12212203121.

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 12130221221 - 2¹⁰ = 12130220197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12130221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12130221223) 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, 151685 + ... + 217413.

It is an arithmetic number, because the mean of its divisors is an integer number (1526250600).

Almost surely, 2^12130221221 is an apocalyptic number.

It is an amenable number.

12130221221 is a deficient number, since it is larger than the sum of its proper divisors (79783579).

12130221221 is a wasteful number, since it uses less digits than its factorization.

12130221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66939.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12130221221 its reverse (12212203121), we get a palindrome (24342424342).

The spelling of 12130221221 in words is "twelve billion, one hundred thirty million, two hundred twenty-one thousand, two hundred twenty-one".