421100144020 has 24 divisors (see below), whose sum is σ = 905878848168. Its totient is φ = 164331763200.

The previous prime is 421100143993. The next prime is 421100144027. The reversal of 421100144020 is 20441001124.

It can be written as a sum of positive squares in 4 ways, for example, as 11661408144 + 409438735876 = 107988^2 + 639874^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421100144027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256767561 + ... + 256769200.

It is an arithmetic number, because the mean of its divisors is an integer number (37744952007).

Almost surely, 2^421100144020 is an apocalyptic number.

It is an amenable number.

421100144020 is an abundant number, since it is smaller than the sum of its proper divisors (484778704148).

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

421100144020 is a wasteful number, since it uses less digits than its factorization.

421100144020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513536811 (or 513536809 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 421100144020 its reverse (20441001124), we get a palindrome (441541145144).

The spelling of 421100144020 in words is "four hundred twenty-one billion, one hundred million, one hundred forty-four thousand, twenty".