20211020100101 has 4 divisors (see below), whose sum is σ = 20495682355104. Its totient is φ = 19926357845100.

The previous prime is 20211020100071. The next prime is 20211020100107. The reversal of 20211020100101 is 10100102011202.

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 20211020100101 - 2³⁴ = 20193840230917 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 (20211020100107) 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, 142331127395 + ... + 142331127536.

It is an arithmetic number, because the mean of its divisors is an integer number (5123920588776).

Almost surely, 2^{20211020100101} is an apocalyptic number.

It is an amenable number.

20211020100101 is a deficient number, since it is larger than the sum of its proper divisors (284662255003).

20211020100101 is an equidigital number, since it uses as much as digits as its factorization.

20211020100101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284662255002.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20211020100101 its reverse (10100102011202), we get a palindrome (30311122111303).

The spelling of 20211020100101 in words is "twenty trillion, two hundred eleven billion, twenty million, one hundred thousand, one hundred one".