20201021102101 has 16 divisors (see below), whose sum is σ = 23316153952000. Its totient is φ = 17143280391168.

The previous prime is 20201021102077. The next prime is 20201021102159. The reversal of 20201021102101 is 10120112010202.

It is a cyclic number.

It is not a de Polignac number, because 20201021102101 - 2⁷ = 20201021101973 is a prime.

It is a super-2 number, since 2×20201021102101² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201021102191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200245 + ... + 6359413.

It is an arithmetic number, because the mean of its divisors is an integer number (1457259622000).

Almost surely, 2^{20201021102101} is an apocalyptic number.

It is an amenable number.

20201021102101 is a deficient number, since it is larger than the sum of its proper divisors (3115132849899).

20201021102101 is a wasteful number, since it uses less digits than its factorization.

20201021102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6163828.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20201021102101 its reverse (10120112010202), we get a palindrome (30321133112303).

The spelling of 20201021102101 in words is "twenty trillion, two hundred one billion, twenty-one million, one hundred two thousand, one hundred one".