21216611244306 has 8 divisors (see below), whose sum is σ = 42433222488624. Its totient is φ = 7072203748100.

The previous prime is 21216611244287. The next prime is 21216611244313. The reversal of 21216611244306 is 60344211661212.

It is a sphenic number, since it is the product of 3 distinct primes.

21216611244306 is an admirable 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, 1768050937020 + ... + 1768050937031.

It is an arithmetic number, because the mean of its divisors is an integer number (5304152811078).

Almost surely, 2^{21216611244306} is an apocalyptic number.

21216611244306 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21216611244306 is a wasteful number, since it uses less digits than its factorization.

21216611244306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536101874056.

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 21216611244306 in words is "twenty-one trillion, two hundred sixteen billion, six hundred eleven million, two hundred forty-four thousand, three hundred six".