21216362460223 has 8 divisors (see below), whose sum is σ = 24252828894848. Its totient is φ = 18181285403544.

The previous prime is 21216362460169. The next prime is 21216362460253. The reversal of 21216362460223 is 32206426361212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21216362460223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21216362460253) 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, 347311761 + ... + 347372842.

It is an arithmetic number, because the mean of its divisors is an integer number (3031603611856).

Almost surely, 2^{21216362460223} is an apocalyptic number.

21216362460223 is a deficient number, since it is larger than the sum of its proper divisors (3036466434625).

21216362460223 is an equidigital number, since it uses as much as digits as its factorization.

21216362460223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694688973.

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 21216362460223 in words is "twenty-one trillion, two hundred sixteen billion, three hundred sixty-two million, four hundred sixty thousand, two hundred twenty-three".