421224243123 has 16 divisors (see below), whose sum is σ = 568449987840. Its totient is φ = 277407937824.

The previous prime is 421224243091. The next prime is 421224243127. The reversal of 421224243123 is 321342422124.

It is not a de Polignac number, because 421224243123 - 2⁵ = 421224243091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421224243127) 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 15 ways as a sum of consecutive naturals, for example, 2945290 + ... + 3084992.

It is an arithmetic number, because the mean of its divisors is an integer number (35528124240).

Almost surely, 2^421224243123 is an apocalyptic number.

421224243123 is a deficient number, since it is larger than the sum of its proper divisors (147225744717).

421224243123 is a wasteful number, since it uses less digits than its factorization.

421224243123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151898.

The product of its digits is 18432, while the sum is 30.

Adding to 421224243123 its reverse (321342422124), we get a palindrome (742566665247).

The spelling of 421224243123 in words is "four hundred twenty-one billion, two hundred twenty-four million, two hundred forty-three thousand, one hundred twenty-three".