1321231201 has 8 divisors (see below), whose sum is σ = 1352935584. Its totient is φ = 1289571360.

The previous prime is 1321231189. The next prime is 1321231207. The reversal of 1321231201 is 1021321231.

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 1321231201 - 2¹¹ = 1321229153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321231207) 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 7 ways as a sum of consecutive naturals, for example, 53310 + ... + 74056.

It is an arithmetic number, because the mean of its divisors is an integer number (169116948).

Almost surely, 2^1321231201 is an apocalyptic number.

It is an amenable number.

1321231201 is a deficient number, since it is larger than the sum of its proper divisors (31704383).

1321231201 is a wasteful number, since it uses less digits than its factorization.

1321231201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22271.

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

The square root of 1321231201 is about 36348.7441461187. The cubic root of 1321231201 is about 1097.3022600249.

Adding to 1321231201 its reverse (1021321231), we get a palindrome (2342552432).

The spelling of 1321231201 in words is "one billion, three hundred twenty-one million, two hundred thirty-one thousand, two hundred one".