1321433123 has 8 divisors (see below), whose sum is σ = 1339175376. Its totient is φ = 1303734400.

The previous prime is 1321433101. The next prime is 1321433131. The reversal of 1321433123 is 3213341231.

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 1321433123 - 2⁸ = 1321432867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321433023) 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, 52703 + ... + 73623.

It is an arithmetic number, because the mean of its divisors is an integer number (167396922).

Almost surely, 2^1321433123 is an apocalyptic number.

1321433123 is a deficient number, since it is larger than the sum of its proper divisors (17742253).

1321433123 is an equidigital number, since it uses as much as digits as its factorization.

1321433123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21765.

The product of its digits is 1296, while the sum is 23.

The square root of 1321433123 is about 36351.5216050168. The cubic root of 1321433123 is about 1097.3581569238.

Adding to 1321433123 its reverse (3213341231), we get a palindrome (4534774354).

The spelling of 1321433123 in words is "one billion, three hundred twenty-one million, four hundred thirty-three thousand, one hundred twenty-three".