1222200321 has 4 divisors (see below), whose sum is σ = 1629600432. Its totient is φ = 814800212.

The previous prime is 1222200313. The next prime is 1222200347. The reversal of 1222200321 is 1230022221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1222200321 - 2³ = 1222200313 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 1222200321.

It is not an unprimeable number, because it can be changed into a prime (1222200311) 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 3 ways as a sum of consecutive naturals, for example, 203700051 + ... + 203700056.

It is an arithmetic number, because the mean of its divisors is an integer number (407400108).

Almost surely, 2^1222200321 is an apocalyptic number.

It is an amenable number.

1222200321 is a deficient number, since it is larger than the sum of its proper divisors (407400111).

1222200321 is an equidigital number, since it uses as much as digits as its factorization.

1222200321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407400110.

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

The square root of 1222200321 is about 34959.9817076611. The cubic root of 1222200321 is about 1069.1717236948.

Adding to 1222200321 its reverse (1230022221), we get a palindrome (2452222542).

The spelling of 1222200321 in words is "one billion, two hundred twenty-two million, two hundred thousand, three hundred twenty-one".