21057044075012 has 12 divisors (see below), whose sum is σ = 40199811416016. Its totient is φ = 9571383670440.

The previous prime is 21057044075003. The next prime is 21057044075029.

It is a happy number.

21057044075012 is nontrivially palindromic in base 10.

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 3 ways as a sum of consecutive naturals, for example, 239284591718 + ... + 239284591805.

It is an arithmetic number, because the mean of its divisors is an integer number (3349984284668).

Almost surely, 2^{21057044075012} is an apocalyptic number.

21057044075012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21057044075012 is a deficient number, since it is larger than the sum of its proper divisors (19142767341004).

21057044075012 is a wasteful number, since it uses less digits than its factorization.

21057044075012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478569183538 (or 478569183536 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The spelling of 21057044075012 in words is "twenty-one trillion, fifty-seven billion, forty-four million, seventy-five thousand, twelve".