421031310020 has 12 divisors (see below), whose sum is σ = 884165751084. Its totient is φ = 168412524000.

The previous prime is 421031309977. The next prime is 421031310043. The reversal of 421031310020 is 20013130124.

It can be written as a sum of positive squares in 2 ways, for example, as 116309645764 + 304721664256 = 341042^2 + 552016^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10525782731 + ... + 10525782770.

It is an arithmetic number, because the mean of its divisors is an integer number (73680479257).

Almost surely, 2^421031310020 is an apocalyptic number.

It is an amenable number.

421031310020 is an abundant number, since it is smaller than the sum of its proper divisors (463134441064).

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

421031310020 is a wasteful number, since it uses less digits than its factorization.

421031310020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21051565510 (or 21051565508 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 421031310020 its reverse (20013130124), we get a palindrome (441044440144).

The spelling of 421031310020 in words is "four hundred twenty-one billion, thirty-one million, three hundred ten thousand, twenty".