1321411321 has 4 divisors (see below), whose sum is σ = 1325660544. Its totient is φ = 1317162100.

The previous prime is 1321411307. The next prime is 1321411331. The reversal of 1321411321 is 1231141231.

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 1321411321 - 2²³ = 1313022713 is a prime.

It is a super-2 number, since 2×1321411321² = 3492255758533930082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321411331) 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, 2124145 + ... + 2124766.

It is an arithmetic number, because the mean of its divisors is an integer number (331415136).

Almost surely, 2^1321411321 is an apocalyptic number.

It is an amenable number.

1321411321 is a deficient number, since it is larger than the sum of its proper divisors (4249223).

1321411321 is an equidigital number, since it uses as much as digits as its factorization.

1321411321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249222.

The product of its digits is 144, while the sum is 19.

The square root of 1321411321 is about 36351.2217263739. The cubic root of 1321411321 is about 1097.3521218765.

Adding to 1321411321 its reverse (1231141231), we get a palindrome (2552552552).

The spelling of 1321411321 in words is "one billion, three hundred twenty-one million, four hundred eleven thousand, three hundred twenty-one".