421440121305 has 96 divisors (see below), whose sum is σ = 877511591424. Its totient is φ = 182936337408.

The previous prime is 421440121301. The next prime is 421440121327. The reversal of 421440121305 is 503121044124.

421440121305 is a `hidden beast` number, since 4 + 2 + 1 + 440 + 1 + 213 + 0 + 5 = 666.

It is not a de Polignac number, because 421440121305 - 2² = 421440121301 is a prime.

It is a super-2 number, since 2×421440121305² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421440121301) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 780267 + ... + 1204863.

It is an arithmetic number, because the mean of its divisors is an integer number (9140745744).

Almost surely, 2^421440121305 is an apocalyptic number.

421440121305 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

421440121305 is an abundant number, since it is smaller than the sum of its proper divisors (456071470119).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421440121305 is a wasteful number, since it uses less digits than its factorization.

421440121305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424775 (or 424772 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 421440121305 its reverse (503121044124), we get a palindrome (924561165429).

The spelling of 421440121305 in words is "four hundred twenty-one billion, four hundred forty million, one hundred twenty-one thousand, three hundred five".