2021310020 has 12 divisors (see below), whose sum is σ = 4244751084. Its totient is φ = 808524000.

The previous prime is 2021309977. The next prime is 2021310023. The reversal of 2021310020 is 200131202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1575931204 + 445378816 = 39698^2 + 21104^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2021309983 and 2021310010.

It is not an unprimeable number, because it can be changed into a prime (2021310023) 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 3 ways as a sum of consecutive naturals, for example, 50532731 + ... + 50532770.

It is an arithmetic number, because the mean of its divisors is an integer number (353729257).

Almost surely, 2^2021310020 is an apocalyptic number.

2021310020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021310020 is an abundant number, since it is smaller than the sum of its proper divisors (2223441064).

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

2021310020 is a wasteful number, since it uses less digits than its factorization.

2021310020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101065510 (or 101065508 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2021310020 is about 44958.9815276103. The cubic root of 2021310020 is about 1264.3800740080.

Adding to 2021310020 its reverse (200131202), we get a palindrome (2221441222).

The spelling of 2021310020 in words is "two billion, twenty-one million, three hundred ten thousand, twenty".