1222002321 has 8 divisors (see below), whose sum is σ = 1630305600. Its totient is φ = 814183632.

The previous prime is 1222002317. The next prime is 1222002323. The reversal of 1222002321 is 1232002221.

It is a happy number.

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

It is not a de Polignac number, because 1222002321 - 2² = 1222002317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1222002321.

It is not an unprimeable number, because it can be changed into a prime (1222002323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115221 + ... + 125378.

It is an arithmetic number, because the mean of its divisors is an integer number (203788200).

Almost surely, 2^1222002321 is an apocalyptic number.

It is an amenable number.

1222002321 is a deficient number, since it is larger than the sum of its proper divisors (408303279).

1222002321 is a wasteful number, since it uses less digits than its factorization.

1222002321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242295.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1222002321 is about 34957.1497836995. The cubic root of 1222002321 is about 1069.1139842690.

Adding to 1222002321 its reverse (1232002221), we get a palindrome (2454004542).

The spelling of 1222002321 in words is "one billion, two hundred twenty-two million, two thousand, three hundred twenty-one".