2220120120221 has 2 divisors, whose sum is σ = 2220120120222. Its totient is φ = 2220120120220.

The previous prime is 2220120120151. The next prime is 2220120120311. The reversal of 2220120120221 is 1220210210222.

It is a happy number.

2220120120221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1149743652121 + 1070376468100 = 1072261^2 + 1034590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2220120120221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2220120120221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220120120721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110060060110 + 1110060060111.

It is an arithmetic number, because the mean of its divisors is an integer number (1110060060111).

Almost surely, 2^{2220120120221} is an apocalyptic number.

It is an amenable number.

2220120120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220120120221 is an equidigital number, since it uses as much as digits as its factorization.

2220120120221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2220120120221 its reverse (1220210210222), we get a palindrome (3440330330443).

Subtracting from 2220120120221 its reverse (1220210210222), we obtain a palindrome (999909909999).

The spelling of 2220120120221 in words is "two trillion, two hundred twenty billion, one hundred twenty million, one hundred twenty thousand, two hundred twenty-one".