12212244221221 has 16 divisors (see below), whose sum is σ = 13455844762176. Its totient is φ = 10990900800000.

The previous prime is 12212244221189. The next prime is 12212244221237.

It is a happy number.

12212244221221 is nontrivially palindromic in base 10.

12212244221221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12212244221221 - 2⁵ = 12212244221189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12212244221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212244221291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9495541 + ... + 10704661.

It is an arithmetic number, because the mean of its divisors is an integer number (840990297636).

Almost surely, 2^{12212244221221} is an apocalyptic number.

12212244221221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12212244221221 is a deficient number, since it is larger than the sum of its proper divisors (1243600540955).

12212244221221 is a wasteful number, since it uses less digits than its factorization.

12212244221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218324.

The product of its digits is 4096, while the sum is 28.

It can be divided in two parts, 1221224 and 4221221, that added together give a palindrome (5442445).

The spelling of 12212244221221 in words is "twelve trillion, two hundred twelve billion, two hundred forty-four million, two hundred twenty-one thousand, two hundred twenty-one".