2010221221 has 4 divisors (see below), whose sum is σ = 2037758572. Its totient is φ = 1982683872.

The previous prime is 2010221207. The next prime is 2010221243. The reversal of 2010221221 is 1221220102.

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 528356196 + 1481865025 = 22986^2 + 38495^2 .

It is a cyclic number.

It is not a de Polignac number, because 2010221221 - 2⁷ = 2010221093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2010221621) 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, 13768566 + ... + 13768711.

It is an arithmetic number, because the mean of its divisors is an integer number (509439643).

Almost surely, 2^2010221221 is an apocalyptic number.

It is an amenable number.

2010221221 is a deficient number, since it is larger than the sum of its proper divisors (27537351).

2010221221 is an equidigital number, since it uses as much as digits as its factorization.

2010221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27537350.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2010221221 is about 44835.4906407859. The cubic root of 2010221221 is about 1262.0637258180.

Adding to 2010221221 its reverse (1221220102), we get a palindrome (3231441323).

The spelling of 2010221221 in words is "two billion, ten million, two hundred twenty-one thousand, two hundred twenty-one".