1243321240423 has 8 divisors (see below), whose sum is σ = 1288991286576. Its totient is φ = 1198381915200.

The previous prime is 1243321240319. The next prime is 1243321240481. The reversal of 1243321240423 is 3240421233421.

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

It is not a de Polignac number, because 1243321240423 - 2³³ = 1234731305831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243321240493) 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, 182676768 + ... + 182683573.

It is an arithmetic number, because the mean of its divisors is an integer number (161123910822).

Almost surely, 2^{1243321240423} is an apocalyptic number.

1243321240423 is a deficient number, since it is larger than the sum of its proper divisors (45670046153).

1243321240423 is an equidigital number, since it uses as much as digits as its factorization.

1243321240423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365360465.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 1243321240423 its reverse (3240421233421), we get a palindrome (4483742473844).

The spelling of 1243321240423 in words is "one trillion, two hundred forty-three billion, three hundred twenty-one million, two hundred forty thousand, four hundred twenty-three".