21112102222 has 8 divisors (see below), whose sum is σ = 33530985936. Its totient is φ = 9935106912.

The previous prime is 21112102217. The next prime is 21112102321. The reversal of 21112102222 is 22220121112.

It is a happy number.

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 = 21112102196 and 21112102205.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 310472058 + ... + 310472125.

It is an arithmetic number, because the mean of its divisors is an integer number (4191373242).

Almost surely, 2^21112102222 is an apocalyptic number.

21112102222 is a deficient number, since it is larger than the sum of its proper divisors (12418883714).

21112102222 is a wasteful number, since it uses less digits than its factorization.

21112102222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620944202.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21112102222 its reverse (22220121112), we get a palindrome (43332223334).

The spelling of 21112102222 in words is "twenty-one billion, one hundred twelve million, one hundred two thousand, two hundred twenty-two".