2021320202120 has 32 divisors (see below), whose sum is σ = 4815498130200. Its totient is φ = 760967605248.

The previous prime is 2021320202089. The next prime is 2021320202129. The reversal of 2021320202120 is 212020231202.

It can be written as a sum of positive squares in 4 ways, for example, as 1670602780324 + 350717421796 = 1292518^2 + 592214^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (2021320202129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1486264175 + ... + 1486265534.

Almost surely, 2^{2021320202120} is an apocalyptic number.

2021320202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021320202120 is an abundant number, since it is smaller than the sum of its proper divisors (2794177928080).

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

2021320202120 is a wasteful number, since it uses less digits than its factorization.

2021320202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2972529737 (or 2972529733 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 2021320202120 its reverse (212020231202), we get a palindrome (2233340433322).

The spelling of 2021320202120 in words is "two trillion, twenty-one billion, three hundred twenty million, two hundred two thousand, one hundred twenty".