421021323304420 has 48 divisors (see below), whose sum is σ = 925520023120896. Its totient is φ = 160680559536000.

The previous prime is 421021323304403. The next prime is 421021323304487. The reversal of 421021323304420 is 24403323120124.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 4782115491 + ... + 4782203530.

It is an arithmetic number, because the mean of its divisors is an integer number (19281667148352).

Almost surely, 2^{421021323304420} is an apocalyptic number.

It is an amenable number.

421021323304420 is an abundant number, since it is smaller than the sum of its proper divisors (504498699816476).

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

421021323304420 is a wasteful number, since it uses less digits than its factorization.

421021323304420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9564319132 (or 9564319130 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 421021323304420 its reverse (24403323120124), we get a palindrome (445424646424544).

The spelling of 421021323304420 in words is "four hundred twenty-one trillion, twenty-one billion, three hundred twenty-three million, three hundred four thousand, four hundred twenty".