121343045503 has 4 divisors (see below), whose sum is σ = 121343763528. Its totient is φ = 121342327480.

The previous prime is 121343045497. The next prime is 121343045531. The reversal of 121343045503 is 305540343121.

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: 305540343121 = 13 ⋅23503103317.

It is a cyclic number.

It is not a de Polignac number, because 121343045503 - 2⁵ = 121343045471 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 (121343045533) 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, 49200 + ... + 495082.

It is an arithmetic number, because the mean of its divisors is an integer number (30335940882).

Almost surely, 2^121343045503 is an apocalyptic number.

121343045503 is a deficient number, since it is larger than the sum of its proper divisors (718025).

121343045503 is an equidigital number, since it uses as much as digits as its factorization.

121343045503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718024.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 121343045503 its reverse (305540343121), we get a palindrome (426883388624).

The spelling of 121343045503 in words is "one hundred twenty-one billion, three hundred forty-three million, forty-five thousand, five hundred three".