421142102020 has 12 divisors (see below), whose sum is σ = 884398414284. Its totient is φ = 168456840800.

The previous prime is 421142101999. The next prime is 421142102023. The reversal of 421142102020 is 20201241124.

It can be written as a sum of positive squares in 2 ways, for example, as 126872740864 + 294269361156 = 356192^2 + 542466^2 .

It is not an unprimeable number, because it can be changed into a prime (421142102023) 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, 10528552531 + ... + 10528552570.

It is an arithmetic number, because the mean of its divisors is an integer number (73699867857).

Almost surely, 2^421142102020 is an apocalyptic number.

It is an amenable number.

421142102020 is an abundant number, since it is smaller than the sum of its proper divisors (463256312264).

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

421142102020 is a wasteful number, since it uses less digits than its factorization.

421142102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21057105110 (or 21057105108 counting only the distinct ones).

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

Adding to 421142102020 its reverse (20201241124), we get a palindrome (441343343144).

The spelling of 421142102020 in words is "four hundred twenty-one billion, one hundred forty-two million, one hundred two thousand, twenty".