2221022221 has 8 divisors (see below), whose sum is σ = 2436321888. Its totient is φ = 2007954000.

The previous prime is 2221022201. The next prime is 2221022227. The reversal of 2221022221 is 1222201222.

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

It is a cyclic number.

It is not a de Polignac number, because 2221022221 - 2⁹ = 2221021709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221022195 and 2221022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221022227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555775 + ... + 559756.

It is an arithmetic number, because the mean of its divisors is an integer number (304540236).

Almost surely, 2^2221022221 is an apocalyptic number.

It is an amenable number.

2221022221 is a deficient number, since it is larger than the sum of its proper divisors (215299667).

2221022221 is a wasteful number, since it uses less digits than its factorization.

2221022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115723.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2221022221 is about 47127.7224253411. The cubic root of 2221022221 is about 1304.7209457986.

Adding to 2221022221 its reverse (1222201222), we get a palindrome (3443223443).

The spelling of 2221022221 in words is "two billion, two hundred twenty-one million, twenty-two thousand, two hundred twenty-one".