12221021311321 has 16 divisors (see below), whose sum is σ = 12498383177280. Its totient is φ = 11946153481920.

The previous prime is 12221021311283. The next prime is 12221021311337. The reversal of 12221021311321 is 12311312012221.

It is a happy number.

12221021311321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12221021311321 - 2³³ = 12212431376729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221021311292 and 12221021311301.

It is not an unprimeable number, because it can be changed into a prime (12221021312321) 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, 206675466 + ... + 206734588.

It is an arithmetic number, because the mean of its divisors is an integer number (781148948580).

Almost surely, 2^{12221021311321} is an apocalyptic number.

It is an amenable number.

12221021311321 is a deficient number, since it is larger than the sum of its proper divisors (277361865959).

12221021311321 is a wasteful number, since it uses less digits than its factorization.

12221021311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80136.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 12221021311321 its reverse (12311312012221), we get a palindrome (24532333323542).

The spelling of 12221021311321 in words is "twelve trillion, two hundred twenty-one billion, twenty-one million, three hundred eleven thousand, three hundred twenty-one".