1320110321 has 4 divisors (see below), whose sum is σ = 1322644644. Its totient is φ = 1317576000.

The previous prime is 1320110279. The next prime is 1320110327. The reversal of 1320110321 is 1230110231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 251539600 + 1068570721 = 15860^2 + 32689^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320110321 - 2¹⁸ = 1319848177 is a prime.

It is a super-2 number, since 2×1320110321² = 3485382519221446082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320110296 and 1320110305.

It is not an unprimeable number, because it can be changed into a prime (1320110327) 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 3 ways as a sum of consecutive naturals, for example, 1266380 + ... + 1267421.

It is an arithmetic number, because the mean of its divisors is an integer number (330661161).

Almost surely, 2^1320110321 is an apocalyptic number.

It is an amenable number.

1320110321 is a deficient number, since it is larger than the sum of its proper divisors (2534323).

1320110321 is an equidigital number, since it uses as much as digits as its factorization.

1320110321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2534322.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1320110321 is about 36333.3224602430. The cubic root of 1320110321 is about 1096.9918697031.

Adding to 1320110321 its reverse (1230110231), we get a palindrome (2550220552).

The spelling of 1320110321 in words is "one billion, three hundred twenty million, one hundred ten thousand, three hundred twenty-one".