21212075404704 has 48 divisors (see below), whose sum is σ = 55689447306528. Its totient is φ = 7069707754752.

The previous prime is 21212075404693. The next prime is 21212075404717. The reversal of 21212075404704 is 40740457021212.

It is a tau number, because it is divible by the number of its divisors (48).

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, 14682187 + ... + 16062090.

It is an arithmetic number, because the mean of its divisors is an integer number (1160196818886).

Almost surely, 2^{21212075404704} is an apocalyptic number.

21212075404704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21212075404704 is an abundant number, since it is smaller than the sum of its proper divisors (34477371901824).

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

21212075404704 is a wasteful number, since it uses less digits than its factorization.

21212075404704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30751477 (or 30751469 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 39.

The spelling of 21212075404704 in words is "twenty-one trillion, two hundred twelve billion, seventy-five million, four hundred four thousand, seven hundred four".