123421222403 has 4 divisors (see below), whose sum is σ = 123422043000. Its totient is φ = 123420401808.

The previous prime is 123421222367. The next prime is 123421222411. The reversal of 123421222403 is 304222124321.

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.

It is a cyclic number.

It is not a de Polignac number, because 123421222403 - 2¹⁰ = 123421221379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123421222433) 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, 112778 + ... + 509471.

It is an arithmetic number, because the mean of its divisors is an integer number (30855510750).

Almost surely, 2^123421222403 is an apocalyptic number.

123421222403 is a deficient number, since it is larger than the sum of its proper divisors (820597).

123421222403 is an equidigital number, since it uses as much as digits as its factorization.

123421222403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820596.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 123421222403 its reverse (304222124321), we get a palindrome (427643346724).

The spelling of 123421222403 in words is "one hundred twenty-three billion, four hundred twenty-one million, two hundred twenty-two thousand, four hundred three".