12120212112221 has 8 divisors (see below), whose sum is σ = 12259988450400. Its totient is φ = 11980823504400.

The previous prime is 12120212112191. The next prime is 12120212112223. The reversal of 12120212112221 is 12221121202121.

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 12120212112221 - 2¹⁰ = 12120212111197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12120212112193 and 12120212112202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120212112223) 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, 96869711 + ... + 96994748.

It is an arithmetic number, because the mean of its divisors is an integer number (1532498556300).

Almost surely, 2^{12120212112221} is an apocalyptic number.

It is an amenable number.

12120212112221 is a deficient number, since it is larger than the sum of its proper divisors (139776338179).

12120212112221 is a wasteful number, since it uses less digits than its factorization.

12120212112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193865179.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12120212112221 its reverse (12221121202121), we get a palindrome (24341333314342).

The spelling of 12120212112221 in words is "twelve trillion, one hundred twenty billion, two hundred twelve million, one hundred twelve thousand, two hundred twenty-one".