421045404351220 has 48 divisors (see below), whose sum is σ = 964658032769088. Its totient is φ = 153094516866560.

The previous prime is 421045404351041. The next prime is 421045404351227. The reversal of 421045404351220 is 22153404540124.

It is a self number, because there is not a number n which added to its sum of digits gives 421045404351220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421045404351227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78026437 + ... + 83247916.

It is an arithmetic number, because the mean of its divisors is an integer number (20097042349356).

Almost surely, 2^{421045404351220} is an apocalyptic number.

It is an amenable number.

421045404351220 is an abundant number, since it is smaller than the sum of its proper divisors (543612628417868).

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

421045404351220 is a wasteful number, since it uses less digits than its factorization.

421045404351220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161286240 (or 161286238 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 421045404351220 its reverse (22153404540124), we get a palindrome (443198808891344).

The spelling of 421045404351220 in words is "four hundred twenty-one trillion, forty-five billion, four hundred four million, three hundred fifty-one thousand, two hundred twenty".