20201010221 has 32 divisors (see below), whose sum is σ = 24113971200. Its totient is φ = 16558914240.

The previous prime is 20201010199. The next prime is 20201010253. The reversal of 20201010221 is 12201010202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20201010221 - 2⁶ = 20201010157 is a prime.

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 (20201010281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11328896 + ... + 11330678.

It is an arithmetic number, because the mean of its divisors is an integer number (753561600).

Almost surely, 2^20201010221 is an apocalyptic number.

It is an amenable number.

20201010221 is a deficient number, since it is larger than the sum of its proper divisors (3912960979).

20201010221 is a wasteful number, since it uses less digits than its factorization.

20201010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409.

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

Adding to 20201010221 its reverse (12201010202), we get a palindrome (32402020423).

The spelling of 20201010221 in words is "twenty billion, two hundred one million, ten thousand, two hundred twenty-one".