20201171060511 has 24 divisors (see below), whose sum is σ = 33397223437344. Its totient is φ = 11526475296960.

The previous prime is 20201171060471. The next prime is 20201171060513. The reversal of 20201171060511 is 11506017110202.

20201171060511 is a `hidden beast` number, since 2 + 0 + 20 + 1 + 1 + 71 + 0 + 60 + 511 = 666.

It is not a de Polignac number, because 20201171060511 - 2⁹ = 20201171059999 is a prime.

It is a super-2 number, since 2×20201171060511² (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 (20201171060513) 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 23 ways as a sum of consecutive naturals, for example, 236776780 + ... + 236862081.

It is an arithmetic number, because the mean of its divisors is an integer number (1391550976556).

Almost surely, 2^{20201171060511} is an apocalyptic number.

20201171060511 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20201171060511 is a deficient number, since it is larger than the sum of its proper divisors (13196052376833).

20201171060511 is a wasteful number, since it uses less digits than its factorization.

20201171060511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473639551 (or 473639548 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 27.

Adding to 20201171060511 its reverse (11506017110202), we get a palindrome (31707188170713).

The spelling of 20201171060511 in words is "twenty trillion, two hundred one billion, one hundred seventy-one million, sixty thousand, five hundred eleven".