20201100100001 has 4 divisors (see below), whose sum is σ = 20428078752900. Its totient is φ = 19974121447104.

The previous prime is 20201100099997. The next prime is 20201100100007. The reversal of 20201100100001 is 10000100110202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5902688907025 + 14298411192976 = 2429545^2 + 3781324^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201100100001 - 2² = 20201100099997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201100100007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113489326316 + ... + 113489326493.

It is an arithmetic number, because the mean of its divisors is an integer number (5107019688225).

Almost surely, 2^{20201100100001} is an apocalyptic number.

It is an amenable number.

20201100100001 is a deficient number, since it is larger than the sum of its proper divisors (226978652899).

20201100100001 is an equidigital number, since it uses as much as digits as its factorization.

20201100100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226978652898.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20201100100001 its reverse (10000100110202), we get a palindrome (30201200210203).

The spelling of 20201100100001 in words is "twenty trillion, two hundred one billion, one hundred million, one hundred thousand, one".