421241224420 has 12 divisors (see below), whose sum is σ = 884606571324. Its totient is φ = 168496489760.

The previous prime is 421241224381. The next prime is 421241224451. The reversal of 421241224420 is 24422142124.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 161043295204 + 260197929216 = 401302^2 + 510096^2 .

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, 10531030591 + ... + 10531030630.

It is an arithmetic number, because the mean of its divisors is an integer number (73717214277).

Almost surely, 2^421241224420 is an apocalyptic number.

It is an amenable number.

421241224420 is an abundant number, since it is smaller than the sum of its proper divisors (463365346904).

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

421241224420 is a wasteful number, since it uses less digits than its factorization.

421241224420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21062061230 (or 21062061228 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 421241224420 its reverse (24422142124), we get a palindrome (445663366544).

The spelling of 421241224420 in words is "four hundred twenty-one billion, two hundred forty-one million, two hundred twenty-four thousand, four hundred twenty".