20201022212101 has 8 divisors (see below), whose sum is σ = 20213446775544. Its totient is φ = 20188599963840.

The previous prime is 20201022212093. The next prime is 20201022212113. The reversal of 20201022212101 is 10121222010202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1841733981025 + 18359288231076 = 1357105^2 + 4284774^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20201022212101 - 2³ = 20201022212093 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 (20201022212171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17042151 + ... + 18188923.

It is an arithmetic number, because the mean of its divisors is an integer number (2526680846943).

Almost surely, 2^{20201022212101} is an apocalyptic number.

It is an amenable number.

20201022212101 is a deficient number, since it is larger than the sum of its proper divisors (12424563443).

20201022212101 is a wasteful number, since it uses less digits than its factorization.

20201022212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157591.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20201022212101 its reverse (10121222010202), we get a palindrome (30322244222303).

The spelling of 20201022212101 in words is "twenty trillion, two hundred one billion, twenty-two million, two hundred twelve thousand, one hundred one".