21000112002216 has 64 divisors (see below), whose sum is σ = 58336324742400. Its totient is φ = 6999715699200.

The previous prime is 21000112002143. The next prime is 21000112002217. The reversal of 21000112002216 is 61220021100012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21000112002217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2501496 + ... + 6946776.

It is an arithmetic number, because the mean of its divisors is an integer number (911505074100).

Almost surely, 2^{21000112002216} is an apocalyptic number.

It is an amenable number.

21000112002216 is an abundant number, since it is smaller than the sum of its proper divisors (37336212740184).

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

21000112002216 is a wasteful number, since it uses less digits than its factorization.

21000112002216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4467167 (or 4467157 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21000112002216 its reverse (61220021100012), we get a palindrome (82220133102228).

The spelling of 21000112002216 in words is "twenty-one trillion, one hundred twelve million, two thousand, two hundred sixteen".