2106221105 has 8 divisors (see below), whose sum is σ = 2581241472. Its totient is φ = 1649126128.

The previous prime is 2106221101. The next prime is 2106221111. The reversal of 2106221105 is 5011226012.

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

It is a cyclic number.

It is not a de Polignac number, because 2106221105 - 2² = 2106221101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2106221101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4481087 + ... + 4481556.

It is an arithmetic number, because the mean of its divisors is an integer number (322655184).

Almost surely, 2^2106221105 is an apocalyptic number.

It is an amenable number.

2106221105 is a deficient number, since it is larger than the sum of its proper divisors (475020367).

2106221105 is an equidigital number, since it uses as much as digits as its factorization.

2106221105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8962695.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 2106221105 is about 45893.5845734456. The cubic root of 2106221105 is about 1281.8424607838.

Adding to 2106221105 its reverse (5011226012), we get a palindrome (7117447117).

The spelling of 2106221105 in words is "two billion, one hundred six million, two hundred twenty-one thousand, one hundred five".