2010221021 has 4 divisors (see below), whose sum is σ = 2059250844. Its totient is φ = 1961191200.

The previous prime is 2010221011. The next prime is 2010221051. The reversal of 2010221021 is 1201220102.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 389272900 + 1620948121 = 19730^2 + 40261^2 .

It is a cyclic number.

It is not a de Polignac number, because 2010221021 - 2²² = 2006026717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2010220993 and 2010221011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2010221011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24514850 + ... + 24514931.

It is an arithmetic number, because the mean of its divisors is an integer number (514812711).

Almost surely, 2^2010221021 is an apocalyptic number.

It is an amenable number.

2010221021 is a deficient number, since it is larger than the sum of its proper divisors (49029823).

2010221021 is an equidigital number, since it uses as much as digits as its factorization.

2010221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49029822.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2010221021 is about 44835.4884104099. The cubic root of 2010221021 is about 1262.0636839631.

Adding to 2010221021 its reverse (1201220102), we get a palindrome (3211441123).

The spelling of 2010221021 in words is "two billion, ten million, two hundred twenty-one thousand, twenty-one".