2021010221 has 8 divisors (see below), whose sum is σ = 2135662080. Its totient is φ = 1907186688.

The previous prime is 2021010209. The next prime is 2021010227. The reversal of 2021010221 is 1220101202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2021010221 - 2⁶ = 2021010157 is a prime.

It is a super-3 number, since 3×2021010221³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021010227) 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, 202061 + ... + 211826.

It is an arithmetic number, because the mean of its divisors is an integer number (266957760).

Almost surely, 2^2021010221 is an apocalyptic number.

It is an amenable number.

2021010221 is a deficient number, since it is larger than the sum of its proper divisors (114651859).

2021010221 is a wasteful number, since it uses less digits than its factorization.

2021010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414163.

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

The square root of 2021010221 is about 44955.6472648320. The cubic root of 2021010221 is about 1264.3175603213.

Adding to 2021010221 its reverse (1220101202), we get a palindrome (3241111423).

The spelling of 2021010221 in words is "two billion, twenty-one million, ten thousand, two hundred twenty-one".