2221200222221 has 8 divisors (see below), whose sum is σ = 2227606769664. Its totient is φ = 2214796837360.

The previous prime is 2221200222173. The next prime is 2221200222223. The reversal of 2221200222221 is 1222220021222.

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-2221200222221 is a prime.

It is a super-3 number, since 3×2221200222221³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221200222193 and 2221200222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221200222223) 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 7 ways as a sum of consecutive naturals, for example, 619676 + ... + 2196906.

It is an arithmetic number, because the mean of its divisors is an integer number (278450846208).

Almost surely, 2^{2221200222221} is an apocalyptic number.

It is an amenable number.

2221200222221 is a deficient number, since it is larger than the sum of its proper divisors (6406547443).

2221200222221 is a wasteful number, since it uses less digits than its factorization.

2221200222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581291.

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

Adding to 2221200222221 its reverse (1222220021222), we get a palindrome (3443420243443).

The spelling of 2221200222221 in words is "two trillion, two hundred twenty-one billion, two hundred million, two hundred twenty-two thousand, two hundred twenty-one".