21212024984 has 16 divisors (see below), whose sum is σ = 39776065200. Its totient is φ = 10605074272.

The previous prime is 21212024971. The next prime is 21212025019. The reversal of 21212024984 is 48942021212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16052 + ... + 206595.

It is an arithmetic number, because the mean of its divisors is an integer number (2486004075).

Almost surely, 2^21212024984 is an apocalyptic number.

It is an amenable number.

21212024984 is a deficient number, since it is larger than the sum of its proper divisors (18564040216).

21212024984 is a wasteful number, since it uses less digits than its factorization.

21212024984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234562 (or 234558 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The spelling of 21212024984 in words is "twenty-one billion, two hundred twelve million, twenty-four thousand, nine hundred eighty-four".