12121422421423 has 32 divisors (see below), whose sum is σ = 15026318028288. Its totient is φ = 9539727436800.

The previous prime is 12121422421403. The next prime is 12121422421463. The reversal of 12121422421423 is 32412422412121.

It is a cyclic number.

It is not a de Polignac number, because 12121422421423 - 2²⁵ = 12121388866991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121422421403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187179736 + ... + 187244482.

It is an arithmetic number, because the mean of its divisors is an integer number (469572438384).

Almost surely, 2^{12121422421423} is an apocalyptic number.

12121422421423 is a deficient number, since it is larger than the sum of its proper divisors (2904895606865).

12121422421423 is a wasteful number, since it uses less digits than its factorization.

12121422421423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103183.

The product of its digits is 12288, while the sum is 31.

Adding to 12121422421423 its reverse (32412422412121), we get a palindrome (44533844833544).

The spelling of 12121422421423 in words is "twelve trillion, one hundred twenty-one billion, four hundred twenty-two million, four hundred twenty-one thousand, four hundred twenty-three".