12212002220221 has 32 divisors (see below), whose sum is σ = 13293407646720. Its totient is φ = 11175833088000.

The previous prime is 12212002220203. The next prime is 12212002220269. The reversal of 12212002220221 is 12202220021221.

It is a cyclic number.

It is not a de Polignac number, because 12212002220221 - 2¹¹ = 12212002218173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212002220291) 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 31 ways as a sum of consecutive naturals, for example, 775997865 + ... + 776013601.

It is an arithmetic number, because the mean of its divisors is an integer number (415418988960).

Almost surely, 2^{12212002220221} is an apocalyptic number.

It is an amenable number.

12212002220221 is a deficient number, since it is larger than the sum of its proper divisors (1081405426499).

12212002220221 is a wasteful number, since it uses less digits than its factorization.

12212002220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18085.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12212002220221 its reverse (12202220021221), we get a palindrome (24414222241442).

The spelling of 12212002220221 in words is "twelve trillion, two hundred twelve billion, two million, two hundred twenty thousand, two hundred twenty-one".