21257422075912 has 32 divisors (see below), whose sum is σ = 43481799633600. Its totient is φ = 9662307019200.

The previous prime is 21257422075909. The next prime is 21257422075931. The reversal of 21257422075912 is 21957022475212.

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, 3545014 + ... + 7421722.

It is an arithmetic number, because the mean of its divisors is an integer number (1358806238550).

Almost surely, 2^{21257422075912} is an apocalyptic number.

21257422075912 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21257422075912 is an abundant number, since it is smaller than the sum of its proper divisors (22224377557688).

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

21257422075912 is a wasteful number, since it uses less digits than its factorization.

21257422075912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3939037 (or 3939033 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 21257422075912 in words is "twenty-one trillion, two hundred fifty-seven billion, four hundred twenty-two million, seventy-five thousand, nine hundred twelve".