1321131423 has 8 divisors (see below), whose sum is σ = 1761811888. Its totient is φ = 880602624.

The previous prime is 1321131407. The next prime is 1321131437. The reversal of 1321131423 is 3241311231.

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

It is not a de Polignac number, because 1321131423 - 2⁴ = 1321131407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321131423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321131023) 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, 15736 + ... + 53757.

It is an arithmetic number, because the mean of its divisors is an integer number (220226486).

Almost surely, 2^1321131423 is an apocalyptic number.

1321131423 is a deficient number, since it is larger than the sum of its proper divisors (440680465).

1321131423 is an equidigital number, since it uses as much as digits as its factorization.

1321131423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75833.

The product of its digits is 432, while the sum is 21.

The square root of 1321131423 is about 36347.3716106131. The cubic root of 1321131423 is about 1097.2746369561.

Adding to 1321131423 its reverse (3241311231), we get a palindrome (4562442654).

The spelling of 1321131423 in words is "one billion, three hundred twenty-one million, one hundred thirty-one thousand, four hundred twenty-three".