2220210222221 has 12 divisors (see below), whose sum is σ = 2330899333308. Its totient is φ = 2114564721984.

The previous prime is 2220210222211. The next prime is 2220210222227. The reversal of 2220210222221 is 1222220120222.

It can be written as a sum of positive squares in 2 ways, for example, as 839853109225 + 1380357112996 = 916435^2 + 1174886^2 .

It is not a de Polignac number, because 2220210222221 - 2⁶ = 2220210222157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220210222193 and 2220210222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220210222227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8883170 + ... + 9129683.

It is an arithmetic number, because the mean of its divisors is an integer number (194241611109).

Almost surely, 2^{2220210222221} is an apocalyptic number.

It is an amenable number.

2220210222221 is a deficient number, since it is larger than the sum of its proper divisors (110689111087).

2220210222221 is a wasteful number, since it uses less digits than its factorization.

2220210222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18013132 (or 18013109 counting only the distinct ones).

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

Adding to 2220210222221 its reverse (1222220120222), we get a palindrome (3442430342443).

The spelling of 2220210222221 in words is "two trillion, two hundred twenty billion, two hundred ten million, two hundred twenty-two thousand, two hundred twenty-one".