421204244204420 has 12 divisors (see below), whose sum is σ = 884528912829324. Its totient is φ = 168481697681760.

The previous prime is 421204244204413. The next prime is 421204244204461. The reversal of 421204244204420 is 24402442402124.

It can be written as a sum of positive squares in 2 ways, for example, as 216697713070336 + 204506531134084 = 14720656^2 + 14300578^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10530106105091 + ... + 10530106105130.

It is an arithmetic number, because the mean of its divisors is an integer number (73710742735777).

Almost surely, 2^{421204244204420} is an apocalyptic number.

It is an amenable number.

421204244204420 is an abundant number, since it is smaller than the sum of its proper divisors (463324668624904).

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

421204244204420 is a wasteful number, since it uses less digits than its factorization.

421204244204420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21060212210230 (or 21060212210228 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 35.

Adding to 421204244204420 its reverse (24402442402124), we get a palindrome (445606686606544).

The spelling of 421204244204420 in words is "four hundred twenty-one trillion, two hundred four billion, two hundred forty-four million, two hundred four thousand, four hundred twenty".