21222011112 has 32 divisors (see below), whose sum is σ = 54056069280. Its totient is φ = 6940531520.

The previous prime is 21222011099. The next prime is 21222011119. The reversal of 21222011112 is 21111022212.

It is a junction number, because it is equal to n+sod(n) for n = 21222011091 and 21222011100.

It is not an unprimeable number, because it can be changed into a prime (21222011119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8340714 + ... + 8343257.

It is an arithmetic number, because the mean of its divisors is an integer number (1689252165).

Almost surely, 2^21222011112 is an apocalyptic number.

It is an amenable number.

21222011112 is an abundant number, since it is smaller than the sum of its proper divisors (32834058168).

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

21222011112 is a wasteful number, since it uses less digits than its factorization.

21222011112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16684033 (or 16684029 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21222011112 its reverse (21111022212), we get a palindrome (42333033324).

The spelling of 21222011112 in words is "twenty-one billion, two hundred twenty-two million, eleven thousand, one hundred twelve".