1243344020323 has 4 divisors (see below), whose sum is σ = 1245372314608. Its totient is φ = 1241315726040.

The previous prime is 1243344020309. The next prime is 1243344020357. The reversal of 1243344020323 is 3230204433421.

It is a happy number.

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 1243344020323 - 2⁹ = 1243344019811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243344023323) 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, 1014146223 + ... + 1014147448.

It is an arithmetic number, because the mean of its divisors is an integer number (311343078652).

Almost surely, 2^{1243344020323} is an apocalyptic number.

1243344020323 is a deficient number, since it is larger than the sum of its proper divisors (2028294285).

1243344020323 is an equidigital number, since it uses as much as digits as its factorization.

1243344020323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028294284.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 1243344020323 its reverse (3230204433421), we get a palindrome (4473548453744).

The spelling of 1243344020323 in words is "one trillion, two hundred forty-three billion, three hundred forty-four million, twenty thousand, three hundred twenty-three".