1222102221 has 8 divisors (see below), whose sum is σ = 1629910080. Its totient is φ = 814514592.

The previous prime is 1222102201. The next prime is 1222102261. The reversal of 1222102221 is 1222012221.

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

It is not a de Polignac number, because 1222102221 - 2⁹ = 1222101709 is a prime.

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 1222102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222102201) 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, 41641 + ... + 64638.

It is an arithmetic number, because the mean of its divisors is an integer number (203738760).

Almost surely, 2^1222102221 is an apocalyptic number.

It is an amenable number.

1222102221 is a deficient number, since it is larger than the sum of its proper divisors (407807859).

1222102221 is a wasteful number, since it uses less digits than its factorization.

1222102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110115.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1222102221 is about 34958.5786467356. The cubic root of 1222102221 is about 1069.1431172134.

Adding to 1222102221 its reverse (1222012221), we get a palindrome (2444114442).

Subtracting from 1222102221 its reverse (1222012221), we obtain a square (90000 = 300²).

The spelling of 1222102221 in words is "one billion, two hundred twenty-two million, one hundred two thousand, two hundred twenty-one".