21222011105 has 8 divisors (see below), whose sum is σ = 26573648832. Its totient is φ = 16239451888.

The previous prime is 21222011099. The next prime is 21222011119. The reversal of 21222011105 is 50111022212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222011105 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 92269499 + ... + 92269728.

It is an arithmetic number, because the mean of its divisors is an integer number (3321706104).

Almost surely, 2^21222011105 is an apocalyptic number.

It is an amenable number.

21222011105 is a deficient number, since it is larger than the sum of its proper divisors (5351637727).

21222011105 is a wasteful number, since it uses less digits than its factorization.

21222011105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184539255.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 21222011105 its reverse (50111022212), we get a palindrome (71333033317).

The spelling of 21222011105 in words is "twenty-one billion, two hundred twenty-two million, eleven thousand, one hundred five".