421355044316220 has 48 divisors (see below), whose sum is σ = 1348336141813248. Its totient is φ = 96309724415040.

The previous prime is 421355044316207. The next prime is 421355044316273. The reversal of 421355044316220 is 22613440553124.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 501613147576 + ... + 501613148415.

It is an arithmetic number, because the mean of its divisors is an integer number (28090336287776).

Almost surely, 2^{421355044316220} is an apocalyptic number.

It is an amenable number.

421355044316220 is an abundant number, since it is smaller than the sum of its proper divisors (926981097497028).

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

421355044316220 is a wasteful number, since it uses less digits than its factorization.

421355044316220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003226296010 (or 1003226296008 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

Adding to 421355044316220 its reverse (22613440553124), we get a palindrome (443968484869344).

The spelling of 421355044316220 in words is "four hundred twenty-one trillion, three hundred fifty-five billion, forty-four million, three hundred sixteen thousand, two hundred twenty".