2220222021221 has 16 divisors (see below), whose sum is σ = 2349757344000. Its totient is φ = 2093632852608.

The previous prime is 2220222021217. The next prime is 2220222021233. The reversal of 2220222021221 is 1221202220222.

It is a cyclic number.

It is not a de Polignac number, because 2220222021221 - 2² = 2220222021217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220222021193 and 2220222021202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220222021211) 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, 1726256 + ... + 2724041.

It is an arithmetic number, because the mean of its divisors is an integer number (146859834000).

Almost surely, 2^{2220222021221} is an apocalyptic number.

It is an amenable number.

2220222021221 is a deficient number, since it is larger than the sum of its proper divisors (129535322779).

2220222021221 is a wasteful number, since it uses less digits than its factorization.

2220222021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4450628.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 2220222021221 its reverse (1221202220222), we get a palindrome (3441424241443).

The spelling of 2220222021221 in words is "two trillion, two hundred twenty billion, two hundred twenty-two million, twenty-one thousand, two hundred twenty-one".