21200212222 has 8 divisors (see below), whose sum is σ = 36343220976. Its totient is φ = 9085805232.

The previous prime is 21200212199. The next prime is 21200212237. The reversal of 21200212222 is 22221200212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21200212196 and 21200212205.

It is a congruent number.

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, 757150423 + ... + 757150450.

It is an arithmetic number, because the mean of its divisors is an integer number (4542902622).

Almost surely, 2^21200212222 is an apocalyptic number.

21200212222 is a deficient number, since it is larger than the sum of its proper divisors (15143008754).

21200212222 is a wasteful number, since it uses less digits than its factorization.

21200212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514300882.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21200212222 its reverse (22221200212), we get a palindrome (43421412434).

The spelling of 21200212222 in words is "twenty-one billion, two hundred million, two hundred twelve thousand, two hundred twenty-two".