21356216216301 has 8 divisors (see below), whose sum is σ = 29244548332384. Its totient is φ = 13852680788880.

The previous prime is 21356216216267. The next prime is 21356216216303. The reversal of 21356216216301 is 10361261265312.

It is a happy number.

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

It is not a de Polignac number, because 21356216216301 - 2⁷ = 21356216216173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21356216216301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21356216216303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96199172035 + ... + 96199172256.

It is an arithmetic number, because the mean of its divisors is an integer number (3655568541548).

Almost surely, 2^{21356216216301} is an apocalyptic number.

It is an amenable number.

21356216216301 is a deficient number, since it is larger than the sum of its proper divisors (7888332116083).

21356216216301 is a wasteful number, since it uses less digits than its factorization.

21356216216301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192398344331.

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 21356216216301 in words is "twenty-one trillion, three hundred fifty-six billion, two hundred sixteen million, two hundred sixteen thousand, three hundred one".