21711067121056 has 48 divisors (see below), whose sum is σ = 42845707424520. Its totient is φ = 10829648527360.

The previous prime is 21711067121039. The next prime is 21711067121071. The reversal of 21711067121056 is 65012176011712.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18097707139600 + 3613359981456 = 4254140^2 + 1900884^2 .

It is an unprimeable number.

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, 22032960 + ... + 22997248.

Almost surely, 2^{21711067121056} is an apocalyptic number.

It is an amenable number.

21711067121056 is a deficient number, since it is larger than the sum of its proper divisors (21134640303464).

21711067121056 is an equidigital number, since it uses as much as digits as its factorization.

21711067121056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965977 (or 965969 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 40.

The spelling of 21711067121056 in words is "twenty-one trillion, seven hundred eleven billion, sixty-seven million, one hundred twenty-one thousand, fifty-six".