1220322321 has 8 divisors (see below), whose sum is σ = 1807884960. Its totient is φ = 813548196.

The previous prime is 1220322317. The next prime is 1220322331. The reversal of 1220322321 is 1232230221.

1220322321 is a `hidden beast` number, since 1 + 2 + 20 + 322 + 321 = 666.

It is not a de Polignac number, because 1220322321 - 2² = 1220322317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220322294 and 1220322303.

It is not an unprimeable number, because it can be changed into a prime (1220322331) 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, 22598535 + ... + 22598588.

It is an arithmetic number, because the mean of its divisors is an integer number (225985620).

Almost surely, 2^1220322321 is an apocalyptic number.

It is an amenable number.

1220322321 is a deficient number, since it is larger than the sum of its proper divisors (587562639).

1220322321 is an equidigital number, since it uses as much as digits as its factorization.

1220322321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45197132 (or 45197126 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1220322321 is about 34933.1121001264. The cubic root of 1220322321 is about 1068.6238228387.

Adding to 1220322321 its reverse (1232230221), we get a palindrome (2452552542).

The spelling of 1220322321 in words is "one billion, two hundred twenty million, three hundred twenty-two thousand, three hundred twenty-one".