20201012200191 has 16 divisors (see below), whose sum is σ = 27084992829440. Its totient is φ = 13392194758560.

The previous prime is 20201012200177. The next prime is 20201012200207. The reversal of 20201012200191 is 19100221010202.

It is not a de Polignac number, because 20201012200191 - 2¹⁸ = 20201011938047 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 (20201012200991) 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 15 ways as a sum of consecutive naturals, for example, 8874330 + ... + 10915848.

It is an arithmetic number, because the mean of its divisors is an integer number (1692812051840).

Almost surely, 2^{20201012200191} is an apocalyptic number.

20201012200191 is a deficient number, since it is larger than the sum of its proper divisors (6883980629249).

20201012200191 is a wasteful number, since it uses less digits than its factorization.

20201012200191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059926.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 20201012200191 its reverse (19100221010202), we get a palindrome (39301233210393).

The spelling of 20201012200191 in words is "twenty trillion, two hundred one billion, twelve million, two hundred thousand, one hundred ninety-one".