1301221321 has 8 divisors (see below), whose sum is σ = 1310891400. Its totient is φ = 1291564032.

The previous prime is 1301221303. The next prime is 1301221333. The reversal of 1301221321 is 1231221031.

It can be written as a sum of positive squares in 4 ways, for example, as 7812025 + 1293409296 = 2795^2 + 35964^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1301221321 - 2²⁵ = 1267666889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1301221295 and 1301221304.

It is not an unprimeable number, because it can be changed into a prime (1301221301) 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 7 ways as a sum of consecutive naturals, for example, 312771 + ... + 316903.

It is an arithmetic number, because the mean of its divisors is an integer number (163861425).

Almost surely, 2^1301221321 is an apocalyptic number.

It is an amenable number.

1301221321 is a deficient number, since it is larger than the sum of its proper divisors (9670079).

1301221321 is a wasteful number, since it uses less digits than its factorization.

1301221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6395.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1301221321 is about 36072.4454535591. The cubic root of 1301221321 is about 1091.7345558412.

Adding to 1301221321 its reverse (1231221031), we get a palindrome (2532442352).

The spelling of 1301221321 in words is "one billion, three hundred one million, two hundred twenty-one thousand, three hundred twenty-one".