421234201423 has 16 divisors (see below), whose sum is σ = 489303632896. Its totient is φ = 355184481600.

The previous prime is 421234201393. The next prime is 421234201441. The reversal of 421234201423 is 324102432124.

It is a cyclic number.

It is not a de Polignac number, because 421234201423 - 2³⁷ = 283795247951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421234201391 and 421234201400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421234202423) 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 15 ways as a sum of consecutive naturals, for example, 1825686 + ... + 2043427.

It is an arithmetic number, because the mean of its divisors is an integer number (30581477056).

Almost surely, 2^421234201423 is an apocalyptic number.

421234201423 is a deficient number, since it is larger than the sum of its proper divisors (68069431473).

421234201423 is a wasteful number, since it uses less digits than its factorization.

421234201423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3869374.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 421234201423 its reverse (324102432124), we get a palindrome (745336633547).

The spelling of 421234201423 in words is "four hundred twenty-one billion, two hundred thirty-four million, two hundred one thousand, four hundred twenty-three".