1321234423043 has 4 divisors (see below), whose sum is σ = 1321309600440. Its totient is φ = 1321159245648.

The previous prime is 1321234423007. The next prime is 1321234423073. The reversal of 1321234423043 is 3403244321231.

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 1321234423043 - 2⁸ = 1321234422787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321234423073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37562330 + ... + 37597487.

It is an arithmetic number, because the mean of its divisors is an integer number (330327400110).

Almost surely, 2^{1321234423043} is an apocalyptic number.

1321234423043 is a deficient number, since it is larger than the sum of its proper divisors (75177397).

1321234423043 is an equidigital number, since it uses as much as digits as its factorization.

1321234423043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75177396.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 1321234423043 its reverse (3403244321231), we get a palindrome (4724478744274).

The spelling of 1321234423043 in words is "one trillion, three hundred twenty-one billion, two hundred thirty-four million, four hundred twenty-three thousand, forty-three".