1321444231 has 4 divisors (see below), whose sum is σ = 1378898352. Its totient is φ = 1263990112.

The previous prime is 1321444219. The next prime is 1321444253. The reversal of 1321444231 is 1324441231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1321444231 - 2⁵ = 1321444199 is a prime.

It is a super-2 number, since 2×1321444231² = 3492429711286362722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321444196 and 1321444205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321414231) 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, 28727026 + ... + 28727071.

It is an arithmetic number, because the mean of its divisors is an integer number (344724588).

Almost surely, 2^1321444231 is an apocalyptic number.

1321444231 is a deficient number, since it is larger than the sum of its proper divisors (57454121).

1321444231 is an equidigital number, since it uses as much as digits as its factorization.

1321444231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57454120.

The product of its digits is 2304, while the sum is 25.

The square root of 1321444231 is about 36351.6743905972. The cubic root of 1321444231 is about 1097.3612317219.

Adding to 1321444231 its reverse (1324441231), we get a palindrome (2645885462).

The spelling of 1321444231 in words is "one billion, three hundred twenty-one million, four hundred forty-four thousand, two hundred thirty-one".