1220244321 has 8 divisors (see below), whose sum is σ = 1639803904. Its totient is φ = 807090480.

The previous prime is 1220244307. The next prime is 1220244331. The reversal of 1220244321 is 1234420221.

1220244321 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1220244321 - 2⁶ = 1220244257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1220244301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1600990 + ... + 1601751.

It is an arithmetic number, because the mean of its divisors is an integer number (204975488).

Almost surely, 2^1220244321 is an apocalyptic number.

It is an amenable number.

1220244321 is a deficient number, since it is larger than the sum of its proper divisors (419559583).

1220244321 is a wasteful number, since it uses less digits than its factorization.

1220244321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202871.

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

The square root of 1220244321 is about 34931.9956630021. The cubic root of 1220244321 is about 1068.6010544185.

Adding to 1220244321 its reverse (1234420221), we get a palindrome (2454664542).

The spelling of 1220244321 in words is "one billion, two hundred twenty million, two hundred forty-four thousand, three hundred twenty-one".