20221000221 has 8 divisors (see below), whose sum is σ = 26995165344. Its totient is φ = 13463750960.

The previous prime is 20221000171. The next prime is 20221000231. The reversal of 20221000221 is 12200012202.

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 20221000221 - 2²³ = 20212611613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20221000197 and 20221000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221000231) 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 7 ways as a sum of consecutive naturals, for example, 4226175 + ... + 4230956.

It is an arithmetic number, because the mean of its divisors is an integer number (3374395668).

Almost surely, 2^20221000221 is an apocalyptic number.

It is an amenable number.

20221000221 is a deficient number, since it is larger than the sum of its proper divisors (6774165123).

20221000221 is an equidigital number, since it uses as much as digits as its factorization.

20221000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8457931.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20221000221 its reverse (12200012202), we get a palindrome (32421012423).

The spelling of 20221000221 in words is "twenty billion, two hundred twenty-one million, two hundred twenty-one", and thus it is an aban number.