21220100222 has 8 divisors (see below), whose sum is σ = 32856929472. Its totient is φ = 10267790400.

The previous prime is 21220100207. The next prime is 21220100227. The reversal of 21220100222 is 22200102212.

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 = 21220100197 and 21220100206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220100227) 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, 171129779 + ... + 171129902.

It is an arithmetic number, because the mean of its divisors is an integer number (4107116184).

Almost surely, 2^21220100222 is an apocalyptic number.

21220100222 is a deficient number, since it is larger than the sum of its proper divisors (11636829250).

21220100222 is a wasteful number, since it uses less digits than its factorization.

21220100222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342259714.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21220100222 its reverse (22200102212), we get a palindrome (43420202434).

The spelling of 21220100222 in words is "twenty-one billion, two hundred twenty million, one hundred thousand, two hundred twenty-two".