2222021200021 has 24 divisors (see below), whose sum is σ = 2737377993240. Its totient is φ = 1792207291392.

The previous prime is 2222021199887. The next prime is 2222021200043. The reversal of 2222021200021 is 1200021202222.

It can be written as a sum of positive squares in 4 ways, for example, as 685633680900 + 1536387519121 = 828030^2 + 1239511^2 .

It is not a de Polignac number, because 2222021200021 - 2⁹ = 2222021199509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2222021199968 and 2222021200004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222021200621) 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 23 ways as a sum of consecutive naturals, for example, 4083051 + ... + 4595143.

It is an arithmetic number, because the mean of its divisors is an integer number (114057416385).

Almost surely, 2^{2222021200021} is an apocalyptic number.

It is an amenable number.

2222021200021 is a deficient number, since it is larger than the sum of its proper divisors (515356793219).

2222021200021 is a wasteful number, since it uses less digits than its factorization.

2222021200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517333 (or 517326 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 2222021200021 its reverse (1200021202222), we get a palindrome (3422042402243).

The spelling of 2222021200021 in words is "two trillion, two hundred twenty-two billion, twenty-one million, two hundred thousand, twenty-one".