1220314321 has 4 divisors (see below), whose sum is σ = 1228504500. Its totient is φ = 1212124144.

The previous prime is 1220314313. The next prime is 1220314327. The reversal of 1220314321 is 1234130221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1234130221 = 443 ⋅2785847.

It can be written as a sum of positive squares in 2 ways, for example, as 41422096 + 1178892225 = 6436^2 + 34335^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220314321 - 2³ = 1220314313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220314327) 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 3 ways as a sum of consecutive naturals, for example, 4094866 + ... + 4095163.

It is an arithmetic number, because the mean of its divisors is an integer number (307126125).

Almost surely, 2^1220314321 is an apocalyptic number.

It is an amenable number.

1220314321 is a deficient number, since it is larger than the sum of its proper divisors (8190179).

1220314321 is an equidigital number, since it uses as much as digits as its factorization.

1220314321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8190178.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1220314321 is about 34932.9975953968. The cubic root of 1220314321 is about 1068.6214876608.

Adding to 1220314321 its reverse (1234130221), we get a palindrome (2454444542).

The spelling of 1220314321 in words is "one billion, two hundred twenty million, three hundred fourteen thousand, three hundred twenty-one".