2220511412221 has 4 divisors (see below), whose sum is σ = 2220537060700. Its totient is φ = 2220485763744.

The previous prime is 2220511412219. The next prime is 2220511412347. The reversal of 2220511412221 is 1222141150222.

2220511412221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1017705686596 + 1202805725625 = 1008814^2 + 1096725^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220511412221 - 2¹ = 2220511412219 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 (2220511412621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12693936 + ... + 12867673.

It is an arithmetic number, because the mean of its divisors is an integer number (555134265175).

Almost surely, 2^{2220511412221} is an apocalyptic number.

It is an amenable number.

2220511412221 is a deficient number, since it is larger than the sum of its proper divisors (25648479).

2220511412221 is an equidigital number, since it uses as much as digits as its factorization.

2220511412221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25648478.

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 2220511412221 its reverse (1222141150222), we get a palindrome (3442652562443).

The spelling of 2220511412221 in words is "two trillion, two hundred twenty billion, five hundred eleven million, four hundred twelve thousand, two hundred twenty-one".