12102212221221 has 8 divisors (see below), whose sum is σ = 16985561012320. Its totient is φ = 7643502455472.

The previous prime is 12102212221217. The next prime is 12102212221339. The reversal of 12102212221221 is 12212221220121.

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

It is not a de Polignac number, because 12102212221221 - 2² = 12102212221217 is a prime.

It is a super-3 number, since 3×12102212221221³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102212221201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106159756270 + ... + 106159756383.

It is an arithmetic number, because the mean of its divisors is an integer number (2123195126540).

Almost surely, 2^{12102212221221} is an apocalyptic number.

It is an amenable number.

12102212221221 is a deficient number, since it is larger than the sum of its proper divisors (4883348791099).

12102212221221 is a wasteful number, since it uses less digits than its factorization.

12102212221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212319512675.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12102212221221 its reverse (12212221220121), we get a palindrome (24314433441342).

The spelling of 12102212221221 in words is "twelve trillion, one hundred two billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty-one".