21224366240216 has 16 divisors (see below), whose sum is σ = 39795744875640. Its totient is φ = 10612167606720.

The previous prime is 21224366240197. The next prime is 21224366240321. The reversal of 21224366240216 is 61204266342212.

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, 5599196 + ... + 8590676.

Almost surely, 2^{21224366240216} is an apocalyptic number.

It is an amenable number.

21224366240216 is a deficient number, since it is larger than the sum of its proper divisors (18571378635424).

21224366240216 is a wasteful number, since it uses less digits than its factorization.

21224366240216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3878354 (or 3878350 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 41.

The spelling of 21224366240216 in words is "twenty-one trillion, two hundred twenty-four billion, three hundred sixty-six million, two hundred forty thousand, two hundred sixteen".