2220202102221 has 12 divisors (see below), whose sum is σ = 3214101044700. Its totient is φ = 1476838218240.

The previous prime is 2220202102211. The next prime is 2220202102231. The reversal of 2220202102221 is 1222012020222.

It is an interprime number because it is at equal distance from previous prime (2220202102211) and next prime (2220202102231).

It can be written as a sum of positive squares in 2 ways, for example, as 1881698062500 + 338504039721 = 1371750^2 + 581811^2 .

It is not a de Polignac number, because 2220202102221 - 2¹¹ = 2220202100173 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2220202102194 and 2220202102203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220202102201) 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, 274705450 + ... + 274713531.

It is an arithmetic number, because the mean of its divisors is an integer number (267841753725).

Almost surely, 2^{2220202102221} is an apocalyptic number.

It is an amenable number.

2220202102221 is a deficient number, since it is larger than the sum of its proper divisors (993898942479).

2220202102221 is a wasteful number, since it uses less digits than its factorization.

2220202102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549419436 (or 549419433 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2220202102221 its reverse (1222012020222), we get a palindrome (3442214122443).

The spelling of 2220202102221 in words is "two trillion, two hundred twenty billion, two hundred two million, one hundred two thousand, two hundred twenty-one".