1201330321 has 4 divisors (see below), whose sum is σ = 1240082944. Its totient is φ = 1162577700.

The previous prime is 1201330289. The next prime is 1201330331. The reversal of 1201330321 is 1230331021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1201330321 - 2⁵ = 1201330289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201330295 and 1201330304.

It is not an unprimeable number, because it can be changed into a prime (1201330331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19376265 + ... + 19376326.

It is an arithmetic number, because the mean of its divisors is an integer number (310020736).

Almost surely, 2^1201330321 is an apocalyptic number.

It is an amenable number.

1201330321 is a deficient number, since it is larger than the sum of its proper divisors (38752623).

1201330321 is an equidigital number, since it uses as much as digits as its factorization.

1201330321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38752622.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1201330321 is about 34660.2123623038. The cubic root of 1201330321 is about 1063.0511122189.

Adding to 1201330321 its reverse (1230331021), we get a palindrome (2431661342).

The spelling of 1201330321 in words is "one billion, two hundred one million, three hundred thirty thousand, three hundred twenty-one".