421111343440 has 40 divisors (see below), whose sum is σ = 982425511368. Its totient is φ = 167869632000.

The previous prime is 421111343357. The next prime is 421111343447. The reversal of 421111343440 is 44343111124.

It can be written as a sum of positive squares in 4 ways, for example, as 278218271296 + 142893072144 = 527464^2 + 378012^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 421111343399 and 421111343408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421111343447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8959311 + ... + 9006190.

Almost surely, 2^421111343440 is an apocalyptic number.

421111343440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421111343440 is an abundant number, since it is smaller than the sum of its proper divisors (561314167928).

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

421111343440 is a wasteful number, since it uses less digits than its factorization.

421111343440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17965807 (or 17965801 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 421111343440 its reverse (44343111124), we get a palindrome (465454454564).

The spelling of 421111343440 in words is "four hundred twenty-one billion, one hundred eleven million, three hundred forty-three thousand, four hundred forty".