20221000001 has 4 divisors (see below), whose sum is σ = 20234747904. Its totient is φ = 20207252100.

The previous prime is 20220999973. The next prime is 20221000061. The reversal of 20221000001 is 10000012202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10000012202 = 2 ⋅5000006101.

It is a cyclic number.

It is not a de Polignac number, because 20221000001 - 2⁶ = 20220999937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20221000061) 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, 6871745 + ... + 6874686.

It is an arithmetic number, because the mean of its divisors is an integer number (5058686976).

Almost surely, 2^20221000001 is an apocalyptic number.

It is an amenable number.

20221000001 is a deficient number, since it is larger than the sum of its proper divisors (13747903).

20221000001 is a wasteful number, since it uses less digits than its factorization.

20221000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13747902.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 20221000001 its reverse (10000012202), we get a palindrome (30221012203).

The spelling of 20221000001 in words is "twenty billion, two hundred twenty-one million, one", and thus it is an aban number.