1204324221 has 4 divisors (see below), whose sum is σ = 1605765632. Its totient is φ = 802882812.

The previous prime is 1204324213. The next prime is 1204324249. The reversal of 1204324221 is 1224234021.

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 not a de Polignac number, because 1204324221 - 2³ = 1204324213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204324021) 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 3 ways as a sum of consecutive naturals, for example, 200720701 + ... + 200720706.

It is an arithmetic number, because the mean of its divisors is an integer number (401441408).

Almost surely, 2^1204324221 is an apocalyptic number.

It is an amenable number.

1204324221 is a deficient number, since it is larger than the sum of its proper divisors (401441411).

1204324221 is an equidigital number, since it uses as much as digits as its factorization.

1204324221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401441410.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1204324221 is about 34703.3747782546. The cubic root of 1204324221 is about 1063.9334752748.

Adding to 1204324221 its reverse (1224234021), we get a palindrome (2428558242).

The spelling of 1204324221 in words is "one billion, two hundred four million, three hundred twenty-four thousand, two hundred twenty-one".