121323443 has 4 divisors (see below), whose sum is σ = 125507040. Its totient is φ = 117139848.

The previous prime is 121323409. The next prime is 121323473. The reversal of 121323443 is 344323121.

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 121323443 - 2⁸ = 121323187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121323473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2091755 + ... + 2091812.

It is an arithmetic number, because the mean of its divisors is an integer number (31376760).

Almost surely, 2^121323443 is an apocalyptic number.

121323443 is a deficient number, since it is larger than the sum of its proper divisors (4183597).

121323443 is an equidigital number, since it uses as much as digits as its factorization.

121323443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4183596.

The product of its digits is 1728, while the sum is 23.

The square root of 121323443 is about 11014.6921427700. The cubic root of 121323443 is about 495.0490622390.

Adding to 121323443 its reverse (344323121), we get a palindrome (465646564).

The spelling of 121323443 in words is "one hundred twenty-one million, three hundred twenty-three thousand, four hundred forty-three".