421220020304 has 20 divisors (see below), whose sum is σ = 823601075220. Its totient is φ = 208677807360.

The previous prime is 421220020283. The next prime is 421220020337. The reversal of 421220020304 is 403020022124.

It can be written as a sum of positive squares in 2 ways, for example, as 168552944704 + 252667075600 = 410552^2 + 502660^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120760877 + ... + 120764364.

It is an arithmetic number, because the mean of its divisors is an integer number (41180053761).

Almost surely, 2^421220020304 is an apocalyptic number.

It is an amenable number.

421220020304 is a deficient number, since it is larger than the sum of its proper divisors (402381054916).

421220020304 is a wasteful number, since it uses less digits than its factorization.

421220020304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241525358 (or 241525352 counting only the distinct ones).

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

Adding to 421220020304 its reverse (403020022124), we get a palindrome (824240042428).

The spelling of 421220020304 in words is "four hundred twenty-one billion, two hundred twenty million, twenty thousand, three hundred four".