1321032321 has 48 divisors (see below), whose sum is σ = 2267725824. Its totient is φ = 752806224.

The previous prime is 1321032313. The next prime is 1321032343. The reversal of 1321032321 is 1232301231.

1321032321 is a `hidden beast` number, since 1 + 321 + 0 + 323 + 21 = 666.

It is not a de Polignac number, because 1321032321 - 2³ = 1321032313 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1321032294 and 1321032303.

It is not an unprimeable number, because it can be changed into a prime (1321032521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 793536 + ... + 795198.

It is an arithmetic number, because the mean of its divisors is an integer number (47244288).

Almost surely, 2^1321032321 is an apocalyptic number.

It is an amenable number.

1321032321 is a deficient number, since it is larger than the sum of its proper divisors (946693503).

1321032321 is an equidigital number, since it uses as much as digits as its factorization.

1321032321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152 (or 2140 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1321032321 is about 36346.0083227856. The cubic root of 1321032321 is about 1097.2471996580.

Adding to 1321032321 its reverse (1232301231), we get a palindrome (2553333552).

The spelling of 1321032321 in words is "one billion, three hundred twenty-one million, thirty-two thousand, three hundred twenty-one".