1321034321 has 2 divisors, whose sum is σ = 1321034322. Its totient is φ = 1321034320.

The previous prime is 1321034269. The next prime is 1321034327. The reversal of 1321034321 is 1234301231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1109622721 + 211411600 = 33311^2 + 14540^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321034321 - 2⁶ = 1321034257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321034293 and 1321034302.

It is not a weakly prime, because it can be changed into another prime (1321034327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660517160 + 660517161.

It is an arithmetic number, because the mean of its divisors is an integer number (660517161).

Almost surely, 2^1321034321 is an apocalyptic number.

It is an amenable number.

1321034321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321034321 is an equidigital number, since it uses as much as digits as its factorization.

1321034321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1321034321 is about 36346.0358361129. The cubic root of 1321034321 is about 1097.2477533899.

Adding to 1321034321 its reverse (1234301231), we get a palindrome (2555335552).

The spelling of 1321034321 in words is "one billion, three hundred twenty-one million, thirty-four thousand, three hundred twenty-one".