12122221211321 has 16 divisors (see below), whose sum is σ = 13207191110400. Its totient is φ = 11059780564800.

The previous prime is 12122221211293. The next prime is 12122221211329. The reversal of 12122221211321 is 12311212222121.

12122221211321 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 12122221211321 - 2⁶ = 12122221211257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12122221211329) 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, 15125330 + ... + 15906603.

It is an arithmetic number, because the mean of its divisors is an integer number (825449444400).

Almost surely, 2^{12122221211321} is an apocalyptic number.

It is an amenable number.

12122221211321 is a deficient number, since it is larger than the sum of its proper divisors (1084969899079).

12122221211321 is a wasteful number, since it uses less digits than its factorization.

12122221211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31032296.

The product of its digits is 384, while the sum is 23.

Adding to 12122221211321 its reverse (12311212222121), we get a palindrome (24433433433442).

The spelling of 12122221211321 in words is "twelve trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred eleven thousand, three hundred twenty-one".