20212020210331 has 4 divisors (see below), whose sum is σ = 20704996313064. Its totient is φ = 19719044107600.

The previous prime is 20212020210293. The next prime is 20212020210337. The reversal of 20212020210331 is 13301202021202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20212020210331 - 2¹¹ = 20212020208283 is a prime.

It is a super-2 number, since 2×20212020210331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212020210299 and 20212020210308.

It is not an unprimeable number, because it can be changed into a prime (20212020210337) 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 3 ways as a sum of consecutive naturals, for example, 246488051305 + ... + 246488051386.

It is an arithmetic number, because the mean of its divisors is an integer number (5176249078266).

Almost surely, 2^{20212020210331} is an apocalyptic number.

20212020210331 is a deficient number, since it is larger than the sum of its proper divisors (492976102733).

20212020210331 is an equidigital number, since it uses as much as digits as its factorization.

20212020210331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492976102732.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20212020210331 its reverse (13301202021202), we get a palindrome (33513222231533).

The spelling of 20212020210331 in words is "twenty trillion, two hundred twelve billion, twenty million, two hundred ten thousand, three hundred thirty-one".