20002021101001 has 4 divisors (see below), whose sum is σ = 20255211241600. Its totient is φ = 19748830960404.

The previous prime is 20002021100923. The next prime is 20002021101031. The reversal of 20002021101001 is 10010112020002.

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 20002021101001 - 2⁹ = 20002021100489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20002021101031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126595070181 + ... + 126595070338.

It is an arithmetic number, because the mean of its divisors is an integer number (5063802810400).

Almost surely, 2^{20002021101001} is an apocalyptic number.

It is an amenable number.

20002021101001 is a deficient number, since it is larger than the sum of its proper divisors (253190140599).

20002021101001 is an equidigital number, since it uses as much as digits as its factorization.

20002021101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253190140598.

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

Adding to 20002021101001 its reverse (10010112020002), we get a palindrome (30012133121003).

The spelling of 20002021101001 in words is "twenty trillion, two billion, twenty-one million, one hundred one thousand, one".