421134445220 has 12 divisors (see below), whose sum is σ = 884382335004. Its totient is φ = 168453778080.

The previous prime is 421134445213. The next prime is 421134445223. The reversal of 421134445220 is 22544431124.

It can be written as a sum of positive squares in 2 ways, for example, as 322542213184 + 98592232036 = 567928^2 + 313994^2 .

It is not an unprimeable number, because it can be changed into a prime (421134445223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10528361111 + ... + 10528361150.

It is an arithmetic number, because the mean of its divisors is an integer number (73698527917).

Almost surely, 2^421134445220 is an apocalyptic number.

It is an amenable number.

421134445220 is an abundant number, since it is smaller than the sum of its proper divisors (463247889784).

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

421134445220 is a wasteful number, since it uses less digits than its factorization.

421134445220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21056722270 (or 21056722268 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 421134445220 its reverse (22544431124), we get a palindrome (443678876344).

The spelling of 421134445220 in words is "four hundred twenty-one billion, one hundred thirty-four million, four hundred forty-five thousand, two hundred twenty".