21212200112 has 20 divisors (see below), whose sum is σ = 41167268400. Its totient is φ = 10588388928.

The previous prime is 21212200043. The next prime is 21212200147. The reversal of 21212200112 is 21100221212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1097063 + ... + 1116230.

It is an arithmetic number, because the mean of its divisors is an integer number (2058363420).

Almost surely, 2^21212200112 is an apocalyptic number.

It is an amenable number.

21212200112 is a deficient number, since it is larger than the sum of its proper divisors (19955068288).

21212200112 is a wasteful number, since it uses less digits than its factorization.

21212200112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213900 (or 2213894 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21212200112 its reverse (21100221212), we get a palindrome (42312421324).

The spelling of 21212200112 in words is "twenty-one billion, two hundred twelve million, two hundred thousand, one hundred twelve".