20021100020101 has 4 divisors (see below), whose sum is σ = 20021389215232. Its totient is φ = 20020810824972.

The previous prime is 20021100020093. The next prime is 20021100020189. The reversal of 20021100020101 is 10102000112002.

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.

It is a cyclic number.

It is not a de Polignac number, because 20021100020101 - 2³ = 20021100020093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021101020101) 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, 144493695 + ... + 144632188.

It is an arithmetic number, because the mean of its divisors is an integer number (5005347303808).

Almost surely, 2^{20021100020101} is an apocalyptic number.

It is an amenable number.

20021100020101 is a deficient number, since it is larger than the sum of its proper divisors (289195131).

20021100020101 is an equidigital number, since it uses as much as digits as its factorization.

20021100020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289195130.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20021100020101 its reverse (10102000112002), we get a palindrome (30123100132103).

The spelling of 20021100020101 in words is "twenty trillion, twenty-one billion, one hundred million, twenty thousand, one hundred one".