4022120423221 has 16 divisors (see below), whose sum is σ = 4298021362800. Its totient is φ = 3750590573568.

The previous prime is 4022120423183. The next prime is 4022120423227. The reversal of 4022120423221 is 1223240212204.

It can be written as a sum of positive squares in 8 ways, for example, as 2035272996 + 4020085150225 = 45114^2 + 2005015^2 .

It is a cyclic number.

It is not a de Polignac number, because 4022120423221 - 2²³ = 4022112034613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4022120423227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41853895 + ... + 41949883.

It is an arithmetic number, because the mean of its divisors is an integer number (268626335175).

Almost surely, 2^{4022120423221} is an apocalyptic number.

It is an amenable number.

4022120423221 is a deficient number, since it is larger than the sum of its proper divisors (275900939579).

4022120423221 is a wasteful number, since it uses less digits than its factorization.

4022120423221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118728.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 4022120423221 its reverse (1223240212204), we get a palindrome (5245360635425).

The spelling of 4022120423221 in words is "four trillion, twenty-two billion, one hundred twenty million, four hundred twenty-three thousand, two hundred twenty-one".