20210000221 has 8 divisors (see below), whose sum is σ = 20883320064. Its totient is φ = 19538016960.

The previous prime is 20210000207. The next prime is 20210000267. The reversal of 20210000221 is 12200001202.

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 20210000221 - 2⁵ = 20210000189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20210000198 and 20210000207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210000201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303355 + ... + 363928.

It is an arithmetic number, because the mean of its divisors is an integer number (2610415008).

Almost surely, 2^20210000221 is an apocalyptic number.

It is an amenable number.

20210000221 is a deficient number, since it is larger than the sum of its proper divisors (673319843).

20210000221 is an equidigital number, since it uses as much as digits as its factorization.

20210000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668291.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20210000221 its reverse (12200001202), we get a palindrome (32410001423).

The spelling of 20210000221 in words is "twenty billion, two hundred ten million, two hundred twenty-one", and thus it is an aban number.