21711100512 has 24 divisors (see below), whose sum is σ = 56991639096. Its totient is φ = 7237033472.

The previous prime is 21711100501. The next prime is 21711100549. The reversal of 21711100512 is 21500111712.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113078553 + ... + 113078744.

It is an arithmetic number, because the mean of its divisors is an integer number (2374651629).

Almost surely, 2^21711100512 is an apocalyptic number.

It is an amenable number.

21711100512 is an abundant number, since it is smaller than the sum of its proper divisors (35280538584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21711100512 is a wasteful number, since it uses less digits than its factorization.

21711100512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226157310 (or 226157302 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 21.

The spelling of 21711100512 in words is "twenty-one billion, seven hundred eleven million, one hundred thousand, five hundred twelve".