21002222101116 has 12 divisors (see below), whose sum is σ = 49005184902632. Its totient is φ = 7000740700368.

The previous prime is 21002222101067. The next prime is 21002222101117. The reversal of 21002222101116 is 61110122220012.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 21002222101092 and 21002222101101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002222101117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875092587535 + ... + 875092587558.

Almost surely, 2^{21002222101116} is an apocalyptic number.

It is an amenable number.

21002222101116 is an abundant number, since it is smaller than the sum of its proper divisors (28002962801516).

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

21002222101116 is a wasteful number, since it uses less digits than its factorization.

21002222101116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750185175100 (or 1750185175098 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 21002222101116 its reverse (61110122220012), we get a palindrome (82112344321128).

The spelling of 21002222101116 in words is "twenty-one trillion, two billion, two hundred twenty-two million, one hundred one thousand, one hundred sixteen".