21211759888 has 40 divisors (see below), whose sum is σ = 44845317216. Its totient is φ = 9639264000.

The previous prime is 21211759879. The next prime is 21211759901. The reversal of 21211759888 is 88895711212.

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 7 ways as a sum of consecutive naturals, for example, 805620 + ... + 831532.

Almost surely, 2^21211759888 is an apocalyptic number.

It is an amenable number.

21211759888 is an abundant number, since it is smaller than the sum of its proper divisors (23633557328).

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

21211759888 is a wasteful number, since it uses less digits than its factorization.

21211759888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30583 (or 30577 counting only the distinct ones).

The product of its digits is 645120, while the sum is 52.

The spelling of 21211759888 in words is "twenty-one billion, two hundred eleven million, seven hundred fifty-nine thousand, eight hundred eighty-eight".