4123330421221 has 16 divisors (see below), whose sum is σ = 4515343455168. Its totient is φ = 3734185033600.

The previous prime is 4123330421173. The next prime is 4123330421239. The reversal of 4123330421221 is 1221240333214.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4123330421221 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 4123330421221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4123330421251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12031191 + ... + 12369163.

It is an arithmetic number, because the mean of its divisors is an integer number (282208965948).

Almost surely, 2^{4123330421221} is an apocalyptic number.

It is an amenable number.

4123330421221 is a deficient number, since it is larger than the sum of its proper divisors (392013033947).

4123330421221 is a wasteful number, since it uses less digits than its factorization.

4123330421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342212.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 4123330421221 its reverse (1221240333214), we get a palindrome (5344570754435).

The spelling of 4123330421221 in words is "four trillion, one hundred twenty-three billion, three hundred thirty million, four hundred twenty-one thousand, two hundred twenty-one".