1321331323 has 8 divisors (see below), whose sum is σ = 1424325728. Its totient is φ = 1218530304.

The previous prime is 1321331303. The next prime is 1321331339. The reversal of 1321331323 is 3231331231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321331323 - 2¹³ = 1321323131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321331294 and 1321331303.

It is not an unprimeable number, because it can be changed into a prime (1321331303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33990 + ... + 61627.

It is an arithmetic number, because the mean of its divisors is an integer number (178040716).

Almost surely, 2^1321331323 is an apocalyptic number.

1321331323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1321331323 is a deficient number, since it is larger than the sum of its proper divisors (102994405).

1321331323 is a wasteful number, since it uses less digits than its factorization.

1321331323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96693.

The product of its digits is 972, while the sum is 22.

The square root of 1321331323 is about 36350.1213615581. The cubic root of 1321331323 is about 1097.3299769306.

Adding to 1321331323 its reverse (3231331231), we get a palindrome (4552662554).

The spelling of 1321331323 in words is "one billion, three hundred twenty-one million, three hundred thirty-one thousand, three hundred twenty-three".