21220200112 has 20 divisors (see below), whose sum is σ = 41634572320. Its totient is φ = 10475794368.

The previous prime is 21220200109. The next prime is 21220200181. The reversal of 21220200112 is 21100202212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21220200092 and 21220200101.

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, 8392803 + ... + 8395330.

It is an arithmetic number, because the mean of its divisors is an integer number (2081728616).

Almost surely, 2^21220200112 is an apocalyptic number.

It is an amenable number.

21220200112 is a deficient number, since it is larger than the sum of its proper divisors (20414372208).

21220200112 is a wasteful number, since it uses less digits than its factorization.

21220200112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16788220 (or 16788214 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21220200112 its reverse (21100202212), we get a palindrome (42320402324).

The spelling of 21220200112 in words is "twenty-one billion, two hundred twenty million, two hundred thousand, one hundred twelve".