2021043201220 has 24 divisors (see below), whose sum is σ = 4244217597144. Its totient is φ = 808412161536.

The previous prime is 2021043201193. The next prime is 2021043201223. The reversal of 2021043201220 is 221023401202.

It can be written as a sum of positive squares in 4 ways, for example, as 179653908736 + 1841389292484 = 423856^2 + 1356978^2 .

It is not an unprimeable number, because it can be changed into a prime (2021043201223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5497822 + ... + 5853898.

It is an arithmetic number, because the mean of its divisors is an integer number (176842399881).

Almost surely, 2^{2021043201220} is an apocalyptic number.

2021043201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021043201220 is an abundant number, since it is smaller than the sum of its proper divisors (2223174395924).

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

2021043201220 is a wasteful number, since it uses less digits than its factorization.

2021043201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639879 (or 639877 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 2021043201220 its reverse (221023401202), we get a palindrome (2242066602422).

The spelling of 2021043201220 in words is "two trillion, twenty-one billion, forty-three million, two hundred one thousand, two hundred twenty".