11071280075821 has 64 divisors (see below), whose sum is σ = 13758139333120. Its totient is φ = 8720805897216.

The previous prime is 11071280075809. The next prime is 11071280075827. The reversal of 11071280075821 is 12857008217011.

It is a happy number.

It is not a de Polignac number, because 11071280075821 - 2⁵ = 11071280075789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11071280075827) 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 63 ways as a sum of consecutive naturals, for example, 598664851 + ... + 598683343.

It is an arithmetic number, because the mean of its divisors is an integer number (214970927080).

Almost surely, 2^{11071280075821} is an apocalyptic number.

It is an amenable number.

11071280075821 is a deficient number, since it is larger than the sum of its proper divisors (2686859257299).

11071280075821 is an equidigital number, since it uses as much as digits as its factorization.

11071280075821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18931 (or 18893 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 43.

The spelling of 11071280075821 in words is "eleven trillion, seventy-one billion, two hundred eighty million, seventy-five thousand, eight hundred twenty-one".