421331104240 has 80 divisors (see below), whose sum is σ = 987068073600. Its totient is φ = 167247534080.

The previous prime is 421331104237. The next prime is 421331104241. The reversal of 421331104240 is 42401133124.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421331104241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57328086 + ... + 57335434.

It is an arithmetic number, because the mean of its divisors is an integer number (12338350920).

Almost surely, 2^421331104240 is an apocalyptic number.

421331104240 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 421331104240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (493534036800).

421331104240 is an abundant number, since it is smaller than the sum of its proper divisors (565736969360).

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

421331104240 is a wasteful number, since it uses less digits than its factorization.

421331104240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12730 (or 12724 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 421331104240 its reverse (42401133124), we get a palindrome (463732237364).

The spelling of 421331104240 in words is "four hundred twenty-one billion, three hundred thirty-one million, one hundred four thousand, two hundred forty".