21210000010216 has 32 divisors (see below), whose sum is σ = 39783485664000. Its totient is φ = 10601071270720.

The previous prime is 21210000010181. The next prime is 21210000010217. The reversal of 21210000010216 is 61201000001212.

It is a self number, because there is not a number n which added to its sum of digits gives 21210000010216.

It is not an unprimeable number, because it can be changed into a prime (21210000010217) 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, 248903985 + ... + 248989183.

It is an arithmetic number, because the mean of its divisors is an integer number (1243233927000).

Almost surely, 2^{21210000010216} is an apocalyptic number.

It is an amenable number.

21210000010216 is a deficient number, since it is larger than the sum of its proper divisors (18573485653784).

21210000010216 is a wasteful number, since it uses less digits than its factorization.

21210000010216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96369 (or 96365 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21210000010216 its reverse (61201000001212), we get a palindrome (82411000011428).

The spelling of 21210000010216 in words is "twenty-one trillion, two hundred ten billion, ten thousand, two hundred sixteen".