121123404343 has 4 divisors (see below), whose sum is σ = 121124165800. Its totient is φ = 121122642888.

The previous prime is 121123404317. The next prime is 121123404359. The reversal of 121123404343 is 343404321121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 343404321121 = 49597 ⋅6923893.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121123404343 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 (121123404373) 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, 41193 + ... + 493906.

It is an arithmetic number, because the mean of its divisors is an integer number (30281041450).

Almost surely, 2^121123404343 is an apocalyptic number.

121123404343 is a deficient number, since it is larger than the sum of its proper divisors (761457).

121123404343 is an equidigital number, since it uses as much as digits as its factorization.

121123404343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761456.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 121123404343 its reverse (343404321121), we get a palindrome (464527725464).

The spelling of 121123404343 in words is "one hundred twenty-one billion, one hundred twenty-three million, four hundred four thousand, three hundred forty-three".