2221021110221 has 8 divisors (see below), whose sum is σ = 2321169312384. Its totient is φ = 2121171413680.

The previous prime is 2221021110167. The next prime is 2221021110239. The reversal of 2221021110221 is 1220111201222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221021110221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221021110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221021112221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74611190 + ... + 74640951.

It is an arithmetic number, because the mean of its divisors is an integer number (290146164048).

Almost surely, 2^{2221021110221} is an apocalyptic number.

It is an amenable number.

2221021110221 is a deficient number, since it is larger than the sum of its proper divisors (100148202163).

2221021110221 is a wasteful number, since it uses less digits than its factorization.

2221021110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149252811.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2221021110221 its reverse (1220111201222), we get a palindrome (3441132311443).

The spelling of 2221021110221 in words is "two trillion, two hundred twenty-one billion, twenty-one million, one hundred ten thousand, two hundred twenty-one".