421230440000 has 280 divisors, whose sum is σ = 1066008711768. Its totient is φ = 165058560000.

The previous prime is 421230439991. The next prime is 421230440051. The reversal of 421230440000 is 44032124.

It can be written as a sum of positive squares in 20 ways, for example, as 403804327936 + 17426112064 = 635456^2 + 132008^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 528519602 + ... + 528520398.

Almost surely, 2^421230440000 is an apocalyptic number.

421230440000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421230440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (533004355884).

421230440000 is an abundant number, since it is smaller than the sum of its proper divisors (644778271768).

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

421230440000 is an equidigital number, since it uses as much as digits as its factorization.

421230440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083 (or 1058 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 421230440000 its reverse (44032124), we get a palindrome (421274472124).

The spelling of 421230440000 in words is "four hundred twenty-one billion, two hundred thirty million, four hundred forty thousand".