12212120112221 has 8 divisors (see below), whose sum is σ = 12215268720000. Its totient is φ = 12208971854560.

The previous prime is 12212120112197. The next prime is 12212120112263. The reversal of 12212120112221 is 12221102121221.

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 12212120112221 - 2²² = 12212115917917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212120112193 and 12212120112202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212120112721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78562586 + ... + 78717876.

It is an arithmetic number, because the mean of its divisors is an integer number (1526908590000).

Almost surely, 2^{12212120112221} is an apocalyptic number.

It is an amenable number.

12212120112221 is a deficient number, since it is larger than the sum of its proper divisors (3148607779).

12212120112221 is a wasteful number, since it uses less digits than its factorization.

12212120112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175059.

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

Adding to 12212120112221 its reverse (12221102121221), we get a palindrome (24433222233442).

The spelling of 12212120112221 in words is "twelve trillion, two hundred twelve billion, one hundred twenty million, one hundred twelve thousand, two hundred twenty-one".